Go Back   Steve's Digicams Forums >

LinkBack Thread Tools Search this Thread
Old Nov 21, 2005, 7:04 AM   #1
Junior Member
Sundance kid's Avatar
Join Date: Nov 2005
Posts: 15

I have recently bought a Nikon D70s and am very impressed. I am now looking for a fast lens for low light conditions and can get a normal 50mm f/1.4 (AF) lens for a good price. Apart from the 50mm becoming a 75mm lens, what other side effects can I expect?

I see everyone now promoting lenses designed for the digital sensor size being smaller than 35mm film, but will I sacrifice anything by staying with a 35mm type lens?

Any help with be appreciated!
Sundance kid is offline   Reply With Quote
Sponsored Links
Old Nov 21, 2005, 8:20 AM   #2
Senior Member
BillDrew's Avatar
Join Date: Jun 2002
Location: Hay River Township, WI
Posts: 2,512

Since problems with lenses normally shows up at the outside edges of the image circle, a lens designed for a full frame 35mm camera will be better on a dSLR with a smaller sensor since it only uses the center part. The advantage of a lens specifically designed for a smaller sensor is price - it is cheaper to build a lens with a smaller image circle.

With very short lenses, there is a possibility a lens designed for full frame might not work as well with digital since the light reaching the sensor is not coming straight on. That can cause some problems since the sensor/micro lens/filter system in the digital sensor is thicker than film. Not sure if this is a theoretical problem or one that has actually been seen.
BillDrew is offline   Reply With Quote
Old Nov 21, 2005, 9:50 AM   #3
Senior Member
eric s's Avatar
Join Date: Dec 2002
Posts: 5,803

I have read some posts by some knowledgeable people that its possible to make a wide angles for digital use that wouldn't suffer from some of the problems they do with film. I don't know if its true, but I have no reason to disbelieve them. Correcting more than just that they use the center of the lens (which does help some.) I think it had to do with pincushing and barrel distortion, but I honestly don't remember the exact issues.

But in general a film lens will perform better on digital for the reason that Drew gave.

eric s is offline   Reply With Quote
Old Nov 22, 2005, 12:33 PM   #4
Junior Member
Sundance kid's Avatar
Join Date: Nov 2005
Posts: 15

Thanks for the feedback. I was worried that I might see some vignetting or other side effects. I must comment that it is sooooo nice to shoot with a SLR again after a few years of point & shoot digitals!

Sundance kid is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -5. The time now is 6:32 AM.