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-   -   Does the focal length rule apply in video mode? (https://www.dvinfo.net/forum/canon-eos-full-frame-hd/142623-does-focal-length-rule-apply-video-mode.html)

Mathieu Kassovitz January 30th, 2009 07:10 PM
Yes, a ND filter is the solution. Although, it seems there isn't any solution for the focal length = shutter speed rule. Unless, the manual mode or twisted lens.

Toenis Liivamaegi January 30th, 2009 07:17 PM
Back to the topic
 
Chris, how can you get ISO 800 with 1/50 shutter with EF lenses other than with the 50mm one?

Maybe it's all the same from 30th to 100th shutter but I'm loosing more light with 1.2 85mm than with 50mm 1.8 because the apparent focal length to shutter speed rule.

Rack focusing is also almost impossible with USM fulltime electronic manual focus that might be the case of 1.2 L only. Straight from the cam http://www.autonomicum.com/forums_up/MVI_0017_bela.MOV (hear the inconstancy of my hand turning the electronic focusing barrel).

T

Mathieu Kassovitz January 30th, 2009 07:24 PM
Quote:
Originally Posted by Jon Fairhurst (Post 1004075)
The risk is that the tape falls off and gums up your shutter or sensor. I taped a cheap lens - and now I have no idea where the tape ended up.

I like the mylar ring idea much better. Maybe some holes can be cut for power. The key is to find a way to keep it from rotating.
Tape or mylar. You are correct. The mylar ring idea is better.

Christopher Witz January 30th, 2009 07:35 PM
Quote:
Originally Posted by Toenis Liivamaegi (Post 1004193)
Chris, how can you get ISO 800 with 1/50 shutter with EF lenses other than with the 50mm one?

Maybe it's all the same from 30th to 100th shutter but I'm loosing more light with 1.2 85mm than with 50mm 1.8 because the apparent focal length to shutter speed rule.

Rack focusing is also almost impossible with USM fulltime electronic manual focus that might be the case of 1.2 L only. Straight from the cam http://www.autonomicum.com/forums_up/MVI_0017_bela.MOV (hear the inconstancy of my hand turning the electronic focusing barrel).

T
I've been seeing 1/30th most of the time with my 85 1.2 II....

Mathieu Kassovitz January 31st, 2009 01:09 PM
There is who has mentioned the focal length = auto shutter speed rule is misleading because it applies only for taking pictures during video recording. Is that so?

Manual Control. The Truth !

Shutter, Aperture, ISO-Display: Are they all wrong?


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