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DSLR: Understanding DSLR Frame Sizes

CreativeCOW presents DSLR: Understanding DSLR Frame Sizes -- DSLR Video Tutorial


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Richard and Robbie tackle a common question dealing with sensors, full frame vs crop sensors. They will discuss the impact of using different type of sensors and lenses with different cameras such as the Canon 5D MK2 or the Nikon D3S.



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Comments

Re: Understanding DSLR Frame Sizes
by Nels Chick
I'm glad you guys are doing a HDSLR podcast. Along with the forum, this is a great resource for shooters.

I do want to contest one concept, and maybe I just misunderstood what I heard, but I don't believe my Canon 7D is using only a small portion of my sensor while I'm shooting, at any frame size. The portion of the sensor being used may be a little bit small than the full ASP-C size, but I believe the video function does use most of that sensor.

This is one reason my 7D suffers from aliasing, especially in 720p mode, because lines are being skipped on the sensor as I'm recording. And it is the big sensor size that allows me to obtain the shallow depth of field while shooting video that makes these cameras so popular.

The only way I can understand the video mode on my 7D not using the full sensor size is in the fact that it skips lines to record the video. In that case it is using less of the sensor, or more accurately, recording less information from the sensor. But the depth of field and field of view in video mode is nearly identical to the still I shoot on the same camera, which seems that it is using nearly the same sensor area in both stills and video modes.

I'm sorry if I completely missed the point on this one guys. You are covering a wide array of cameras, and what you've said probably holds true for some of them. I don't believe it does for any of Canon's offerings (except maybe the 60D in one of the Standard Def modes).

I like the show! Please keep'em coming, and don't let jerk like me get on your nerves too much! Thanks!
Re: Understanding DSLR Frame Sizes
by Robbie Carman
Nels your right. Rich and I actually discussed this issue. Since the target of these shows is the beginner the idea of discussing binning and line skipping along with scaling that can happen was a can of worms we didn't want to open for a intro podcast. Its something we'll talk about in more depth in future episodes. So an easier way of putting it (perhaps not as concise as it could have been) was to say you're using a smaller portion of the sensor to effectively get a 2.1 MP 1920 x 1080 image. I understand the confusion though and thanks for pointing it out

Robbie Carman
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by Nels Chick
Thanks Robbie! You're right as well, line skipping is a way too messy topic to discuss in this episode. I appreciate your reply and understanding.

inconveniencethemovie.com
Re: Tutorial: Understanding DSLR Frame Sizes
by Peter DeCrescenzo
Thanks for the nice intro video. I'm looking forward to your next installment.

FYI: I find the sensor size comparison charts on these 2 pages to be very helpful:

http://www.dvxuser.com/V6/showthread.php?227826-Relative-Focal-Length-Angle...

http://www.abelcine.com/fov/

Cheers.

---

http://www.peterdv.com


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