Now that we have come to the end of this composition on ip cameras, we do hope that you enjoyed reading it as much as we enjoyed writing it.
ip cameras For Your Reading Pleasure
Camera Shake and Image Stabilization (Vibration Reduction)
When you are first buying camera equipment you see a lot of lenses that have the IS or VR designations on them. This is Image Stabilization or Vibration Reduction. They mean the same thing except Canon uses the first term and Nikon uses the second. These are mechanisms built into the camera lens to prevent "camera shake". I will discuss how to get rid of camera shake and why I purchased a VR lens for myself.
What is Camera Shake?
When you are holding your camera in your hands and looking through the view finder to take your photo, your body is making slight movements. This is a natural thing as your body is always correcting itself and your muscles move to help maintain your balance. However, it causes slight movements in your camera. When your camera is zoomed in on a subject that is a reasonable distance away, these slight movements become more noticeable.
For example. If your hand slightly shakes and turns your camera 1 degree off its line of direction and your subject is 15 feet away, this would correspond to 3.1 inches being added in the direction your camera turned. Now say that the movement of your hand happened when you took your picture and while the shutter was open. This would blur the image on film or on your digital image.
How Do I Prevent My Pictures From Blurring?
There are 3 ways to prevent this.
- Make sure you have a shutter speed fast enough so that your hand movements don't affect the picture.
- Use a tripod.
- Have a lens with vibration reduction or image stabilization.
Each of these methods have their pros and cons.
1. Have a Fast Enough Shutter Speed
Ideally, you would want this situation every time. The rule of thumb is that you need a shutter speed of 1 over the focal length your lens is set at. So if you are zoomed all the way in with your 300mm lens, you would want 1/300 second shutter speed or better (so 1/320 on the standard camera). This will usually guarantee (for the average user) the shutter won't be open long enough to make your hand movements noticeable on the final image If you have steady hands you will be able to get away with a slower speed. The catch here is will you have enough light to expose your picture. If it is the middle of a bright day you are fine. If it is darker you might have to use a more sensitive film, but this will cause your picture to be grainier.
Note: When you see expensive lenses with the same zoom capability as a cheaper lens, look at the maximum aperture for this lens. Chances are it will be a lot larger than the cheaper one. F/2.8 is a common one. The lower the number, the larger the aperture can go. This means a lot more light will get let in when you take the picture, so it will be able to have higher shutter speeds.
2. Use a Tri-pod
This will always work. Now you can have the shutter open as long as your want and the image won't have any blurring (this is assuming your subject isn't moving or is moving slowly). Tripods are cumbersome and annoying however. And they definitely don't work in a lot of circumstances, especially traveling.
3. Use a Lens With Image Stabilization or Vibration Reduction
This is "meet in the middle" approach as you still need a decent shutter speed, but you won't need a tripod and its cheaper than a fast lens. Inside the camera there is a mechanism to adjust the glass lenses slightly to compensate for the movements of your hand. IS and VR will give you a few shutter speed stops back. So if you can't quite get enough light to have 1/320 sec shutter speed as in the example above. VR will let you go down to 1/125 sec (4 full stops in ideal situations). A lot of times, this will give you enough light to properly expose your image. VR and IS will make a lens cost extra, but they are still cheaper than buying the fast lenses I spoke of above. Fast lenses don't usually have much zoom capability either (a limitation of having such a large aperture).
The main article has an example of two images. One was taken without VR turned on and the other had VR on. This is a picture in my home taken with my Nikon D70s with the Nikon 18-200mm VR lens.
To summarize. The cheapest solution is to buy a tripod, the second is to buy a lens with IS or VR, and the most expensive is to buy "fast" lenses. I am a casual photographer and use it more for traveling so VR has been the best option for myself. If you find yourself with similar needs and want to eliminate camera shake from more of your photos, then I would definitely recommend looking at VR and IS lenses.
For more articles on photography from this author, please check out www.thoughtsfrommylife.com/category-Photography.
The author maintains the site www.thoughtsfrommylife.com. |
ip cameras Products we recommend
Corel Photo Album 6 Deluxe
Corel Photo Album 6 Deluxe
Corel's Photo Album 6 unlocks the magicofyour digital camera. This smart and simple software automatically takes care of common photo tasks like downloading&organizing, so you can spend your time having fun with your photos. PHOTORECOVERY software helps you recover accidentally deleted photos
Customer Review: major disappointment
Corel acquired Photo Album 6 from JASC and then promptly abandoned development, leaving a host of unresolved problems, ranging in severity from annoying to quite serious. Here are just a few examples:
1. The "View/Sort Thumbnails" setting is not remembered, i.e., if you want to see thumbnails sorted by name, you must specify this every time you open the application.
2. Photo Album 6 settings sometimes get corrupted. Corel's only solution for this is to open the "Application Data" folder for the current user and then delete the "Corel Photo Album" folder. This resets the database, which has several undesirable side effects, e.g., all keywords and descriptions are lost, and the program forgets all favorite folder selections.
3. There is no good mechanism for transferring the database from one computer to another. In particular, there is no way to merge two databases together, i.e., one database must overwrite the other.
4. There is no way to control the text size in menus. In particular, there is no way to increase the text size in the "Favorite Folders" or "All Folders" lists, a significant problem for users with poor vision.
Given the length of time that has elapsed, it has become clear that these and hundreds of other problems with Photo Album will never be fixed.
On top of all this, Corel technical support is surly and unhelpful.
I am now looking for a suitable alternative to replace this application.
Customer Review: So Far, Not So Good
I purchased this product new for my mom and sister-in-law with no grand expectations about what I had ordered. Imagine my surprise then when one of the products arrived in a re-used bubble envelope (folded inside-out with the previous customer's name in the return address line) and the other in a regular USPS Priority Mail box. If this was the only issue, I would not have bothered writing a review but the CD itself came in an unmarked paper envelope without any packaging, leading me to wonder if this product was really new.
I have come to expect better of Amazon and do not think the vendor and distributor should be showing a picture of a software package in promoting this item since what you see is not what you get.
As for the merits of this product, the jury is still out but so far its seller and Amazon have left a bad first impression.
Sealife Mini Wide Angle Lens SL960
Sealife Mini Wide Angle Lens SL960
For those moments when you just need to get everything in the shot! A must have lens for divers. Get closer to the subject and still fit everything into the picture. Fits SeaLife ReefMaster Mini (SL320) and ECOshot (SL321) digital cameras. See the difference!
Customer Review: Be sure...
to attach a string from the wide-angle lense to the camera.
Due to the lense blocking out the flash you will need to take the lense off frequently in order to take flash pictures. If you don't attach it to the camera it is fairly easy to re-mount it incorrectly and have it fall off.
Fortunately someone else on my dive found mine and returned it.
Case Logic Large Digital Camera Case
Case Logic Large Digital Camera Case
Nylon camcorder case holds compact camcorder, digital or 35mm camera and accessories. Weather-resistant and thickly-padded, this case protects delicate equipment.
Customer Review: Excellent camera bag
This bag holds my Camcorder (a Canon ZR model), my digital camera (a canon P&S), extra batteries for each camera, extra CF cards, and 2 mini DV tapes. It can be worn on either the shoulder or belt. I took this all through Europe and it performed magnificently. To be able to walk around with both of my cameras and accessories, almost unobtrusively, on my belt made our vacation so much more enjoyable. Excellent product.
Customer Review: Great bag, great price
This bag works great for my Panasonic FZ18, it even fits the hood, just barely though, and it has a front pouch for memory cards, batteries, cables, snacks, whatever you need. This is a great camera bag for a camera that is slightly bigger than most, I doubt it would fit a DSLR with Lens though.
Celestron 52265 C90 Maksutov Spotting Scope
Celestron 52265 C90 Maksutov Spotting Scope
The Maksutov optical design is recognized for being a portable design that is easy to use and has a variety of applications, making it an excellent choice for both terrestrial and astronomical usage. This C90 Mak has excellent optics with razor sharp images over a wide field. The C90 Mak features an internal flip mirror design which allows the user to view celestial objects at a 90 degree angle and also corrects the image orientation to view land objects at a 45 degree angle. The full-featured C90 MAK is also rubber covered and completely waterproof. This model features durable black rubber armor for protection, a flip up lens cap for safety, and it comes complete inside its own soft sided carrying case.
Customer Review: Celestron 90 review
I bought this scope for birding. I am a ametuar birder.
C90 is a catadioptric scope which folds the light path in the optical tube. The pro of this design is that it can be made short and compact and well-seal for waterproof. C90 is relative short and large aperture among spotting scopes. The other good thing is that you can use hundreds of 1.25" eyepiece for it.
The optics: its optics is good. The front glass is coated with a purple-tint anti-reflecting layer. And there is a flip-mirror inside the rear part which can reflect the light to its 90 degree window for astronomic observation (like the star diagonals). From the 90 degree window, the image is crisp and very good details (much better than my Minox 62 ED). It comes with a 45 degree erecting prism; however, the prism is a cheap stuff. It is not coated and degree the image obviously. I strongly suggest replace it with better multicoated prism or a star diagonals.
I have tried a Baader 8-24mm Zoom on C90. Wow, that is sooooooo nice! The color, contrast and detail is very good. Color is very accurate. I found that the its 32mm plossl has yellow-tint. I really enjoy birding with this zoom.
That's my review on C90.
Customer Review: FANTASTIC Scope for the $$$
I was going to get a more expensive new Telescope but tried this one out instead. The view of the moon with the standard eyepiece is phenomenal and when I use my 10mm wide angle eyepiece it is like being on one of the landers! Much more portable than anything larger and the view is about the same. Don't be fooled by larger, more expensive scopes. When you look at Jupiter it is still only going to be a twinkling object in the sky with the $600 scope!
When Saturn was near I could see the ring around it plainly with just the 10mm wide angle eyepiece.
Try this one BEFORE you spend too much money for something that collects dust in your house!
Current ip cameras News
Extreme CCTV releases new IP camera - IPSecurityWatch
Thu, 19 Jun 2008 20:13:15 GMT
 IPSecurityWatch | Extreme CCTV releases new IP camera IPSecurityWatch, GA - Extreme CCTV releases the EX36 IP camera, combining performance optics, vandal resistant construction and IP connectivity to deliver networked surveillance ... |
Hello world!
Thu, 05 Jun 2008 07:48:49 -0700
Hello world! June 5th, 2008 by mass365acre Gone are the days of small, grainy, black and white surveillance camera’s and systems. With technology moving forward by leaps and bounds everywhere else it is about time for Video Surveillance to move forward as well. And it is!! As an IT professional and Security Consultant these new advances in CCTV technology are very exciting. You now have the ability to securely watch your surveillance systems across the internet or even on your cell phone! Wi
AVerMedia launches instant network video recorder - Electronista
Thu, 26 Jun 2008 20:38:44 GMT
AVerMedia launches instant network video recorder Electronista, CA - The package includes the Network Video Recorder main unit, a wireless router and four wireless IP cameras that are ready to set-up, with no configuration ... |
ip cameras For Your Reading Pleasure
Camera Shake and Image Stabilization (Vibration Reduction)
When you are first buying camera equipment you see a lot of lenses that have the IS or VR designations on them. This is Image Stabilization or Vibration Reduction. They mean the same thing except Canon uses the first term and Nikon uses the second. These are mechanisms built into the camera lens to prevent "camera shake". I will discuss how to get rid of camera shake and why I purchased a VR lens for myself.
What is Camera Shake?
When you are holding your camera in your hands and looking through the view finder to take your photo, your body is making slight movements. This is a natural thing as your body is always correcting itself and your muscles move to help maintain your balance. However, it causes slight movements in your camera. When your camera is zoomed in on a subject that is a reasonable distance away, these slight movements become more noticeable.
For example. If your hand slightly shakes and turns your camera 1 degree off its line of direction and your subject is 15 feet away, this would correspond to 3.1 inches being added in the direction your camera turned. Now say that the movement of your hand happened when you took your picture and while the shutter was open. This would blur the image on film or on your digital image.
How Do I Prevent My Pictures From Blurring?
There are 3 ways to prevent this.
- Make sure you have a shutter speed fast enough so that your hand movements don't affect the picture.
- Use a tripod.
- Have a lens with vibration reduction or image stabilization.
Each of these methods have their pros and cons.
1. Have a Fast Enough Shutter Speed
Ideally, you would want this situation every time. The rule of thumb is that you need a shutter speed of 1 over the focal length your lens is set at. So if you are zoomed all the way in with your 300mm lens, you would want 1/300 second shutter speed or better (so 1/320 on the standard camera). This will usually guarantee (for the average user) the shutter won't be open long enough to make your hand movements noticeable on the final image If you have steady hands you will be able to get away with a slower speed. The catch here is will you have enough light to expose your picture. If it is the middle of a bright day you are fine. If it is darker you might have to use a more sensitive film, but this will cause your picture to be grainier.
Note: When you see expensive lenses with the same zoom capability as a cheaper lens, look at the maximum aperture for this lens. Chances are it will be a lot larger than the cheaper one. F/2.8 is a common one. The lower the number, the larger the aperture can go. This means a lot more light will get let in when you take the picture, so it will be able to have higher shutter speeds.
2. Use a Tri-pod
This will always work. Now you can have the shutter open as long as your want and the image won't have any blurring (this is assuming your subject isn't moving or is moving slowly). Tripods are cumbersome and annoying however. And they definitely don't work in a lot of circumstances, especially traveling.
3. Use a Lens With Image Stabilization or Vibration Reduction
This is "meet in the middle" approach as you still need a decent shutter speed, but you won't need a tripod and its cheaper than a fast lens. Inside the camera there is a mechanism to adjust the glass lenses slightly to compensate for the movements of your hand. IS and VR will give you a few shutter speed stops back. So if you can't quite get enough light to have 1/320 sec shutter speed as in the example above. VR will let you go down to 1/125 sec (4 full stops in ideal situations). A lot of times, this will give you enough light to properly expose your image. VR and IS will make a lens cost extra, but they are still cheaper than buying the fast lenses I spoke of above. Fast lenses don't usually have much zoom capability either (a limitation of having such a large aperture).
The main article has an example of two images. One was taken without VR turned on and the other had VR on. This is a picture in my home taken with my Nikon D70s with the Nikon 18-200mm VR lens.
To summarize. The cheapest solution is to buy a tripod, the second is to buy a lens with IS or VR, and the most expensive is to buy "fast" lenses. I am a casual photographer and use it more for traveling so VR has been the best option for myself. If you find yourself with similar needs and want to eliminate camera shake from more of your photos, then I would definitely recommend looking at VR and IS lenses.
For more articles on photography from this author, please check out www.thoughtsfrommylife.com/category-Photography.
The author maintains the site www.thoughtsfrommylife.com. |
ip cameras Products we recommend
Corel Photo Album 6 Deluxe
Corel Photo Album 6 Deluxe
Corel's Photo Album 6 unlocks the magicofyour digital camera. This smart and simple software automatically takes care of common photo tasks like downloading&organizing, so you can spend your time having fun with your photos. PHOTORECOVERY software helps you recover accidentally deleted photos
Customer Review: major disappointment
Corel acquired Photo Album 6 from JASC and then promptly abandoned development, leaving a host of unresolved problems, ranging in severity from annoying to quite serious. Here are just a few examples:
1. The "View/Sort Thumbnails" setting is not remembered, i.e., if you want to see thumbnails sorted by name, you must specify this every time you open the application.
2. Photo Album 6 settings sometimes get corrupted. Corel's only solution for this is to open the "Application Data" folder for the current user and then delete the "Corel Photo Album" folder. This resets the database, which has several undesirable side effects, e.g., all keywords and descriptions are lost, and the program forgets all favorite folder selections.
3. There is no good mechanism for transferring the database from one computer to another. In particular, there is no way to merge two databases together, i.e., one database must overwrite the other.
4. There is no way to control the text size in menus. In particular, there is no way to increase the text size in the "Favorite Folders" or "All Folders" lists, a significant problem for users with poor vision.
Given the length of time that has elapsed, it has become clear that these and hundreds of other problems with Photo Album will never be fixed.
On top of all this, Corel technical support is surly and unhelpful.
I am now looking for a suitable alternative to replace this application.
Customer Review: So Far, Not So Good
I purchased this product new for my mom and sister-in-law with no grand expectations about what I had ordered. Imagine my surprise then when one of the products arrived in a re-used bubble envelope (folded inside-out with the previous customer's name in the return address line) and the other in a regular USPS Priority Mail box. If this was the only issue, I would not have bothered writing a review but the CD itself came in an unmarked paper envelope without any packaging, leading me to wonder if this product was really new.
I have come to expect better of Amazon and do not think the vendor and distributor should be showing a picture of a software package in promoting this item since what you see is not what you get.
As for the merits of this product, the jury is still out but so far its seller and Amazon have left a bad first impression.
Sealife Mini Wide Angle Lens SL960
Sealife Mini Wide Angle Lens SL960
For those moments when you just need to get everything in the shot! A must have lens for divers. Get closer to the subject and still fit everything into the picture. Fits SeaLife ReefMaster Mini (SL320) and ECOshot (SL321) digital cameras. See the difference!
Customer Review: Be sure...
to attach a string from the wide-angle lense to the camera.
Due to the lense blocking out the flash you will need to take the lense off frequently in order to take flash pictures. If you don't attach it to the camera it is fairly easy to re-mount it incorrectly and have it fall off.
Fortunately someone else on my dive found mine and returned it.
Case Logic Large Digital Camera Case
Case Logic Large Digital Camera Case
Nylon camcorder case holds compact camcorder, digital or 35mm camera and accessories. Weather-resistant and thickly-padded, this case protects delicate equipment.
Customer Review: Excellent camera bag
This bag holds my Camcorder (a Canon ZR model), my digital camera (a canon P&S), extra batteries for each camera, extra CF cards, and 2 mini DV tapes. It can be worn on either the shoulder or belt. I took this all through Europe and it performed magnificently. To be able to walk around with both of my cameras and accessories, almost unobtrusively, on my belt made our vacation so much more enjoyable. Excellent product.
Customer Review: Great bag, great price
This bag works great for my Panasonic FZ18, it even fits the hood, just barely though, and it has a front pouch for memory cards, batteries, cables, snacks, whatever you need. This is a great camera bag for a camera that is slightly bigger than most, I doubt it would fit a DSLR with Lens though.
Celestron 52265 C90 Maksutov Spotting Scope
Celestron 52265 C90 Maksutov Spotting Scope
The Maksutov optical design is recognized for being a portable design that is easy to use and has a variety of applications, making it an excellent choice for both terrestrial and astronomical usage. This C90 Mak has excellent optics with razor sharp images over a wide field. The C90 Mak features an internal flip mirror design which allows the user to view celestial objects at a 90 degree angle and also corrects the image orientation to view land objects at a 45 degree angle. The full-featured C90 MAK is also rubber covered and completely waterproof. This model features durable black rubber armor for protection, a flip up lens cap for safety, and it comes complete inside its own soft sided carrying case.
Customer Review: Celestron 90 review
I bought this scope for birding. I am a ametuar birder.
C90 is a catadioptric scope which folds the light path in the optical tube. The pro of this design is that it can be made short and compact and well-seal for waterproof. C90 is relative short and large aperture among spotting scopes. The other good thing is that you can use hundreds of 1.25" eyepiece for it.
The optics: its optics is good. The front glass is coated with a purple-tint anti-reflecting layer. And there is a flip-mirror inside the rear part which can reflect the light to its 90 degree window for astronomic observation (like the star diagonals). From the 90 degree window, the image is crisp and very good details (much better than my Minox 62 ED). It comes with a 45 degree erecting prism; however, the prism is a cheap stuff. It is not coated and degree the image obviously. I strongly suggest replace it with better multicoated prism or a star diagonals.
I have tried a Baader 8-24mm Zoom on C90. Wow, that is sooooooo nice! The color, contrast and detail is very good. Color is very accurate. I found that the its 32mm plossl has yellow-tint. I really enjoy birding with this zoom.
That's my review on C90.
Customer Review: FANTASTIC Scope for the $$$
I was going to get a more expensive new Telescope but tried this one out instead. The view of the moon with the standard eyepiece is phenomenal and when I use my 10mm wide angle eyepiece it is like being on one of the landers! Much more portable than anything larger and the view is about the same. Don't be fooled by larger, more expensive scopes. When you look at Jupiter it is still only going to be a twinkling object in the sky with the $600 scope!
When Saturn was near I could see the ring around it plainly with just the 10mm wide angle eyepiece.
Try this one BEFORE you spend too much money for something that collects dust in your house!
Current ip cameras News
Extreme CCTV releases new IP camera - IPSecurityWatch
Thu, 19 Jun 2008 20:13:15 GMT
IPSecurityWatch | Extreme CCTV releases new IP camera IPSecurityWatch, GA - Extreme CCTV releases the EX36 IP camera, combining performance optics, vandal resistant construction and IP connectivity to deliver networked surveillance ... |
Hello world!
Thu, 05 Jun 2008 07:48:49 -0700
Hello world! June 5th, 2008 by mass365acre Gone are the days of small, grainy, black and white surveillance camera’s and systems. With technology moving forward by leaps and bounds everywhere else it is about time for Video Surveillance to move forward as well. And it is!! As an IT professional and Security Consultant these new advances in CCTV technology are very exciting. You now have the ability to securely watch your surveillance systems across the internet or even on your cell phone! Wi
AVerMedia launches instant network video recorder - Electronista
Thu, 26 Jun 2008 20:38:44 GMT
AVerMedia launches instant network video recorder Electronista, CA - The package includes the Network Video Recorder main unit, a wireless router and four wireless IP cameras that are ready to set-up, with no configuration ... |
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