Sigma 30mm f1.4

by the way, this is my lens choice for "normal" as well, but first i plan to get the 17-55mm at 2.8 by Tamron
 
el presidente said:
Ive got one on mine...

I bought a tokina 11-16 2.8, sigma 30mm 1.4 an old cheapo 18-55mm lens (from my old 300d) and nikon 50mm 1.4(still waitin for adapter to arrive from ebay.).....I really like it, it can have real problems auto focusing...not that im bothered...its also a bit noisy(as in loud) when whippping focus but I got it for £250 2nd hand
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I'm planning similarly, tokina, sigma 30 and old AI/AIS I already have.
different focus direction problem aside (maybe a reverse gear to engage/move away on my Redrock ff?), I read Sigma 30 1.4 can have a stiff focus ring.
How do you find focusing that lens on 7D compared to the Nikkor 50 on a 5D?
 
Focusing is never easy when fully open. I have a ff but im trying to be able to get by without using it. This lens would take a ff...its not stiff tho but it doesnt have an actual stop at either end(shouldnt really matter just be careful)..to compare between this and an older lens...much less distance from 1 to infinity...but I dont have a 5d...shouldnt make a difference should it?
 
el presidente said:
Focusing is never easy when fully open. I have a ff but im trying to be able to get by without using it. This lens would take a ff...its not stiff tho but it doesnt have an actual stop at either end(shouldnt really matter just be careful)..to compare between this and an older lens...much less distance from 1 to infinity...but I dont have a 5d...shouldnt make a difference should it?
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Thanks. Yea, no difference. The big difference (I think, yet to try actually) beeing that less distance from 1 to infinity (comparing a 7D+30@f2 vs. similar 5D+50@f4).
Cheers
 
Luis Caffesse said:
I bought one when I picked up my 7D body last week - I have to say that so far I love it. Haven't been able to really put it through the full paces - but I'll be using it on a gig in the next two days so I should be able to come back with some more details after this shoot.

I can tell you this - having a 1.4 spoils you really quickly.
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Would absolutely love to see how this goes with the 7D, Luis!!

Please upload some footage if you get a chance too!! :)
 
I've read here and there that this lens had to be recalibrated for a handful of people. How do you know if your lens isn't focusing correctly 100%? Is there any sort of test one could perform?
 
Jean Dantes said:
I've read here and there that this lens had to be recalibrated for a handful of people. How do you know if your lens isn't focusing correctly 100%? Is there any sort of test one could perform?
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The old-fashioned way of focusing, and still the preferred method by professionals, is to use a measuring tape. If the focusing mechanism (auto or manual) on the lens is calibrated correctly, then the distance marks on the lens barrel should correspond perfectly with the distance marks on the measuring tape.
 
ydgmdlu said:
The old-fashioned way of focusing, and still the preferred method by professionals, is to use a measuring tape. If the focusing mechanism on the lens is calibrated correctly, then the distance marks on the lens barrel should correspond perfectly with the distance marks on the measuring tape.
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Wow! Awesome! Thanks for that ydgmdlu! I hope I get a good one that doesn't require calibration!
 
Testing the autofocus accuracy is even less tedious. All that you need to do is let the lens settle to a point that it considers focused, and then check the display. If it looks obviously soft, then the autofocus is off. It could be slightly off, even if the image doesn't look soft. So you would then switch to manual focus and see if you get the image even sharper. Focus assist really helps here.
 
I've got the Sigma 30mm f/1.4 and shot some footage on the 7d with it this past weekend. I'm editing with clients in the office today but I'll try to put something together and upload a link for yall to take a look at before this evening. Good lowlight image with excellent bokeh.

Ash
www.iniosante.com
 
iniosante said:
I've got the Sigma 30mm f/1.4 and shot some footage on the 7d with it this past weekend. I'm editing with clients in the office today but I'll try to put something together and upload a link for yall to take a look at before this evening. Good lowlight image with excellent bokeh.
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This lens is on the top of my 'buy' list, so I'm really looking forward to your post. :)
 
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