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18

Yes the trigger voltage on some old flashes is too high for modern electronic cameras. There is a page on botzilla Photo Strobe Trigger Voltages which lists many old flash units. I don't see your dad's flash model there, but the 20 B3 model had a trigger voltage of 168 volts. According to this thread on photo.net, the 7D can handle up to 250V, so that ...


15

From my experience with my 7D and now a 5D (mkIII), I'd say for wildlife stuff, the 7D would be your preferred choice, for four reasons:- APS-C 1.6x crop sensor. This will extend the reach of any and all lenses you put on your camera. A 200mm becomes a 320, a 400mm becomes a 640, etc. Using teleconverters will cost you light, and therefore require slower ...


14

I don't have a 7d, but I do have a different DSLR with a fixed screen (not on a swivel). At first I was not a live view believer, but I have come around. Pretty much whenever my camera is on a tripod (e.g. landscape, cityscape, architecture Exposure am in live view these days. It buys me a few things: The magnification option lets me check for very sharp ...


13

Canon EOS bodies can accept two types of lenses, EF and EF-S mount. EF work on all and EF-S only work on crop sensor bodies. Both the XT and 7D are crop sensors so they accept either EF or EFS lenses. If you were to purchase a full frame body such as a 5D mrk II or 1d X then you could only use EF lenses on those bodies.


11

Normally I'd suggest upgrading lenses and not bodies but in this case going to the 6D is going to solve your two problems: The 6D has significantly better low light performance than the T2i/550D Your 50mm will have the same field of view on the 6D as a 30mm on the T2i I recommend you get the 6D and then maybe, if you miss the field of view of a 50mm on a ...


10

No Canon dSLR has built in image stabilization. Canon offers it in select lenses, known as 'IS' lenses. So, no, neither offer image stabilization. All Canon cameras also offer noise reduction, and of course, it can be applied (or not in the case of RAW) on the computer after the fact as well. Does it matter? Noise reduction matters, because all cameras ...


9

They are all compatible. Both have the same mount and sensor size. On most DSLR brands other than Nikon, that is all you need to know.


9

The Canon 7D has quite nice weather sealing - "Canon considers the weather resistance of the EOS 7D to be slightly better than the EOS 5D Mark II and 50D cameras, but not as robust as the EOS-1D series." (Chuck Westfall, Canon USA) What this basically means is that you can not worry about shooting in rain. I wouldn't take it swimming, but you might be able ...


9

You can do it using Magic Lantern software for your Canon. In fact, there's a setting that will save you some shutter opens/closes. http://vimeo.com/37084470 The camera does not need to be connected to the computer. There is no real danger to the camera. Depending on how long the timelapse is, you may need to have the camera on a power supply, or use a ...


9

There is no official successor anywhere, people deduce it based on model numbers. For the 50D, the 60D is the numeric successor and it does supersede it in most features. A few were lost which is why some people say that 60D is not the right successor. This does happen from time-to-time. The 7D is a much higher-end camera and is really for a different-...


9

First, the thing you need to remember about noise is that it is only indirectly related to ISO. The real culprit where noise is concerned is a low Signal to Noise Ratio (SNR). This is technically answered using controlled testing to illustrate the point in this question: Is high ISO useful for photography? This answer to another question addresses the more ...


8

Resolution becomes less of an issue the farther the viewer is from the image. As billboards are meant to be viewed from quite some distance, they are usually printed at a relatively low resolution - sometimes as low as 9dpi! It really depends on how detailed and complex the photo is, but I'm sure the 18 megapixels provided by the 7D will provide more than ...


8

The Demanding Sensor The Canon 7D is a very demanding camera, with a particularly demanding sensor. When compared on a megapixels basis, 18mp doesn't sound like much...the 1D X has 18mp, the 5D III has 22mp, the D800 has 36.3mp. Megapixels and Line Pairs A simple scalar number doesn't tell you the whole story though. The 7D's 18 megapixels differs a lot ...


8

That combo should be fine as suggested above, however the actual deciding factor for all lenses is not the WEIGHT of the lens, but the TORQUE applied to the mount. Torque is the actual pulling/twisting force, which is (basically) weight X distance. (also the lens's centre of gravity has a large effect on this calculation, it is NOT simply length of lens X ...


8

Several things could be going on. Based on the question as originally written you might have been experiencing buffer congestion. When the buffer is full the camera must wait until enough space has been sufficiently cleared from the buffer as the data is written to the memory card before it can take the next frame. Under such conditions, the "double tap" ...


8

No. P, Tv, Av, M, Bulb and (in our discussion) the Custom modes (C1, C2, C3 etc.) have all different/independent values for Av and Tv stored in separate memory locations in camera's NVRAM for the user-definable (constant) part of the said program (none for P, Time for Tv, Aperture for Av, both for M etc.).


7

Why don't you set the mode to be manual focus and put a colored tape over the AF/MF button while you are using it and so when you return the lens, the tape will be an in your face reminder to change it back to Auto Focus mode.


7

Nobody's actually asking what you use the camera for, so there's no way to tell whether or not the upgrade will benefit you. I recently bought a T3i to be a second body along with a 7D; buying a second 7D seemed overkill for what I was using it for. Whether upgrading to the 7D makes sense depends on what you're doing with it. How often do you hit a ...


7

You can use the software "EOS Utility" that comes with the camera. The remote shooting function lets you do time lapse through a connected USB cable. Advantage: You have the space of the PC hard disk instead of the flashcard, which is most likely much larger. That is great if you take really long time lapses. You can also see better what is happening and ...


6

Both of these cameras will give comparable image quality, and for portrait photography, you are probably not going to use most of the extra features of the 7D, so if you are on a budget, I would get the 60D and use the money saved to put towards a better lens. Both of these cameras have the same very high resolution crop sensor which, in my experience, ...


6

The Canon 7D is definitely well suited to that and has much better noise management at higher ISOs than the XS. I've used one for the last 18 months or so and it's a great body, very responsive -- I consider it a pro-caliber body that happens to have a crop sensor. Depending on what you need, however, you might not need it. The T3i has similar electronics ...


6

7d's weather sealing is as good as the lens attached to it. 50mm f/1.8 is not weather sealed. 7d has been known to resist mild water splashes, however there is no empirical data to support that claim. This question digs a bit deeper into the weather resistance of 7d.


6

The 17-55 is a great lens, the biggest downside is that you can only use it on crop sensor cameras. Other than that I find that the picture is very sharp and the autofocus among the fastest I have used so far (Faster than the one in your 50mm 1.4 or 100mm Macro for sure, I also own these two). On the other hand if you're doing landscapes I don't really see ...


6

I have the 7D and have never experienced this phenomenon. A couple of things to try:- Set camera settings back to factory defaults. (There is a menu option to do this). Wipe all custom function settings (not included in the above, I don't think). Try to replicate the problem after each step above. If it still exhibits the problem:- Remove the main ...


6

The sharpness setting does not make a difference to the RAW image, but would be applied if you're shooting JPG. I don't know what setting would be best, but if the range is 0-7 I would think an intermediate value (3 or 4) would be a good starting point. If you are going to err, I'd err on the side of having less sharpening, because you can always sharpen ...


6

5472 × 3648 pixels at quality=81 One of the ways to check: exiftool -b -previewimage -w jpg canonraw.cr2 This will extract the preview from canonraw.cr2 file and write it next to the canonraw.cr2 file as canonraw.jpg. Next, run imagemagick/identify over the canonraw.jpg like this: identify -verbose canonraw.jpg | grep 'Quality\|Geometry' exiftool: http:/...


6

Yes, there's a way to disable flash by default when using Auto mode: just use the P mode instead. The P mode calculates the ISO, aperture and shutter speed automatically as well, but leaves some options for you to tweak. You can for example disable/enable the flash yourself and also decide to set the ISO yourself.


5

I would highly recommend the EF-S 17-55mm f/2.8 IS USM. I used this on my 350D and 7D for a couple of years before selling it on. My reason for getting rid of it was simply because I preferred primes to zooms. The optical quality of this lens is stunning, and should be an L series lens in many peoples opinions. It has aspherical elements and coatings like ...


5

For video I believe the requirements would be a card that can write 10 MB/s (mega bytes per second). This equals to 66x speed for a Compact Flash card. For shooting stills it's possible to get a longer burst with a faster card. If you want maximum burst length, get the quickest CF card you can afford. The math would be: 66 * 150kB/s = 9900kB/s ~ 10MB/s 66x ...


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