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Archive 2010Missing my 50/1.2L...
p.3 #2Missing my 50/1.2L...
Focus shift. And people who say it doesn't have it just never trigger the "sweet spot" for this phenomenon, not that there's something wrong with that (not hitting it). But all lenses have it - it's a "feature" of the optical design, and has nothing to do with bad alignment.
I have MA calibrated my 50L for f2 @ 3m, since that's how I shoot it most of the time. Of course that means that anything wider open is front focused, but I pretty much always shoot at f2 because I can't stand the look of the 50L wide open.
I have MA calibrated my 50L for f2 @ 3m, since that's how I shoot it most of the time. Of course that means that anything wider open is front focused, but I pretty much always shoot at f2 because I can't stand the look of the 50L wide open.
Jun 22, 2010 at 09:54 AM
p.3 #3Missing my 50/1.2L...
But does this only happen when stopped down from a certain point?
Jun 22, 2010 at 09:55 AM
p.3 #5Missing my 50/1.2L...
Interesting. I don't think I've used it stopped down beyond f/1.8 yet. will have to give it a go.
Jun 22, 2010 at 10:05 AM
p.3 #6Missing my 50/1.2L...
ahh...another session on the 501.2
For anyone that's interested I did a test of the focus shift a few months ago on a 5D2 in the danger zone.
https://www.fredmiranda.com/forum/topic/872117/5#8198417
For anyone that's interested I did a test of the focus shift a few months ago on a 5D2 in the danger zone.
https://www.fredmiranda.com/forum/topic/872117/5#8198417
Jun 22, 2010 at 01:28 PM
p.3 #7Missing my 50/1.2L...
edean wrote:
ahh...another session on the 501.2
For anyone that's interested I did a test of the focus shift a few months ago on a 5D2 in the danger zone.
https://www.fredmiranda.com/forum/topic/872117/5#8198417
Since you have a 5D2, try this:
Set camera on tripod
Enter live view
Set Av f2.0
Focus on something focus worthy about 5 feet away (using live view)
Take picture
Take same picture at f1.2
Compare focal planes
Come report back
ahh...another session on the 501.2
For anyone that's interested I did a test of the focus shift a few months ago on a 5D2 in the danger zone.
https://www.fredmiranda.com/forum/topic/872117/5#8198417
Since you have a 5D2, try this:
Set camera on tripod
Enter live view
Set Av f2.0
Focus on something focus worthy about 5 feet away (using live view)
Take picture
Take same picture at f1.2
Compare focal planes
Come report back
Jun 22, 2010 at 01:57 PM
p.3 #8Missing my 50/1.2L...
Yes I have tested it before. It has a small focus shift. But not much
f/1,2
http://www.pbase.com/larsjohnsson/image/103117897/original.jpg
f/2,8
http://www.pbase.com/larsjohnsson/image/103117898/original.jpg
f/1,2
http://www.pbase.com/larsjohnsson/image/103117897/original.jpg
f/2,8
http://www.pbase.com/larsjohnsson/image/103117898/original.jpg
Jun 22, 2010 at 02:30 PM