lens vignetting at DVinfo.net

Andy Graham · February 16th, 2007, 11:32 AM

I have a clip here showing vignetting at the telephoto end of the lens, I was wondering if this is the same on other peoples HD100s?.

The bird is in focus but you can clearly see that it is out of focus all around the bird.

It pretty much means I can't use the telephoto end to mimic shallow depth of field which is a right pain.

The clip is around 40mb

http://www.box.net/public/static/sm8mn0oxjz.m2v

BTW i tried capturing HDV25p with the new 5.1.3 FCP update and i managed to capture an 11 min clip uninterrupted which i could never do before. It only made a new clip when i stopped recording and then started again, which i can live with.

Andy.

Tim Dashwood · February 16th, 2007, 09:09 PM

Yep. The stock lens vignettes on focal lengths longer than 45mm.

Steve Oakley · February 16th, 2007, 10:51 PM

so do a lot of other lenses. basically they let it zoom a bit further than it should for better numbers. plenty of 1/2 and 2/3 glass that does the same. that said, just consider it the look of the lens and work with it rather than fight it. I really don't have much issue until you get to the last 10%

Steve Oakley

Liam Hall · February 17th, 2007, 04:11 AM

This lens is also pretty soft below f4, which makes going for shallow depth of field a little more interesting. For I/Vs you can never have enough subject to B/G distance.

Nice tit shot BTW!

Liam.

Andy Graham · February 17th, 2007, 04:33 AM

Quote:

Originally Posted by Liam Hall

Nice tit shot BTW! Liam.

Yeah and i swore to myself i wouldn't get into that line of work!

Anyway cheers for the replys, just wanted to make sure it wasn't a duff lens.

Andy.

February 16th, 2007, 11:32 AM	#1
Andy Graham Major Player Join Date: Dec 2005 Location: Lanark,Scotland Posts: 736	lens vignetting I have a clip here showing vignetting at the telephoto end of the lens, I was wondering if this is the same on other peoples HD100s?. The bird is in focus but you can clearly see that it is out of focus all around the bird. It pretty much means I can't use the telephoto end to mimic shallow depth of field which is a right pain. The clip is around 40mb http://www.box.net/public/static/sm8mn0oxjz.m2v BTW i tried capturing HDV25p with the new 5.1.3 FCP update and i managed to capture an 11 min clip uninterrupted which i could never do before. It only made a new clip when i stopped recording and then started again, which i can live with. Andy. __________________ Actor: "where would that light be coming from?" DP: "same place as the music" -Andrew Lesnie- Last edited by Andy Graham; February 16th, 2007 at 12:20 PM.

February 16th, 2007, 09:09 PM	#2
Tim Dashwood Wrangler Join Date: Aug 2005 Location: Toronto, ON, Canada Posts: 3,637	Yep. The stock lens vignettes on focal lengths longer than 45mm. __________________ Tim Dashwood

February 16th, 2007, 10:51 PM	#3
Steve Oakley Trustee Join Date: Apr 2006 Location: United States Posts: 1,158	so do a lot of other lenses. basically they let it zoom a bit further than it should for better numbers. plenty of 1/2 and 2/3 glass that does the same. that said, just consider it the look of the lens and work with it rather than fight it. I really don't have much issue until you get to the last 10% Steve Oakley

February 17th, 2007, 04:11 AM	#4
Liam Hall Major Player Join Date: Sep 2006 Location: London, England Posts: 969	This lens is also pretty soft below f4, which makes going for shallow depth of field a little more interesting. For I/Vs you can never have enough subject to B/G distance. Nice tit shot BTW! Liam.