Enlarging the grans
Old 12-19-2018   #1
Pherdinand
the snow must go on
 
Pherdinand's Avatar
 
Pherdinand is offline
Join Date: Jul 2004
Location: by the river called the Gender
Age: 42
Posts: 7,825
Enlarging the grans

Hello y'all,

I have read an almost infinite amount of opinions on enlarging lens sharpness.
Lenses get designed and redesigned, apochromatic and other super expensive versions surface.
Now, i don't mean to underestimate a physicist or engineer at work, myself being one. And it's definitely good to keep them nerds off the streets.
However.
My brief analog enlarging experience shows that no matter the lens, i can see the film grain (with a grain focuser, that is) with all my lenses at all magnifications.

So the question:
If two lenses can both project a sharp image of the film grain onto the paper, where the heck does it matter "which lens is sharper"???
(Let's stick with black and white for simplicity.)

Thank you for reading!
Now say something!
__________________
Happy New Year, Happy New Continent!
eye contact eye
My RFF Foolery
  Reply With Quote

Old 12-19-2018   #2
FujiLove
Registered User
 
FujiLove is offline
Join Date: May 2014
Posts: 575
My limited understanding is that expensive lenses are sharp to the extreme corners and they produce very even illumination i.e. no light fall off.

Do you see sharp grain at the edges of the images with your cheaper lens?
  Reply With Quote

Old 12-19-2018   #3
FujiLove
Registered User
 
FujiLove is offline
Join Date: May 2014
Posts: 575
Oh, and less distortion (barrel, pincushion etc).
  Reply With Quote

Old 12-19-2018   #4
Bille
Registered User
 
Bille's Avatar
 
Bille is offline
Join Date: Nov 2012
Age: 41
Posts: 758
Quote:
Originally Posted by Pherdinand View Post
My brief analog enlarging experience shows that no matter the lens, i can see the film grain (with a grain focuser, that is) with all my lenses at all magnifications.

So the question:
If two lenses can both project a sharp image of the film grain onto the paper, where the heck does it matter "which lens is sharper"???

See chapter 6 / Page 57 ff.
http://ctein.com/PostExposure2ndIllustrated.pdf

Hope this answers some of your questions
__________________
www.endzeit.de
  Reply With Quote

Old 12-19-2018   #5
Steve M.
Registered User
 
Steve M. is offline
Join Date: Jun 2009
Posts: 3,382
What FujilLve said. There's the resolution aspect as well. Seeing the grain is one thing, and having a sharp lens is quite another. That's an apples and oranges comparison, and is really more about lens resolution and focus accuracy. Expensive (sharper) lenses tend to be faster wide open too, which makes focusing them easier. A lens w/ more contrast will give more apparent sharpness, which will make printing low contrast negatives easier. A lot of variables go into picking out the right enlarging lens. Things like focal length and coverage are relevant as well. In the end, like all things photographic, the best lens is the one you like most.
  Reply With Quote

Old 12-20-2018   #6
Pherdinand
the snow must go on
 
Pherdinand's Avatar
 
Pherdinand is offline
Join Date: Jul 2004
Location: by the river called the Gender
Age: 42
Posts: 7,825
Thanks Bille, interesting book.
__________________
Happy New Year, Happy New Continent!
eye contact eye
My RFF Foolery
  Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 10:17.


vBulletin skin developed by: eXtremepixels
Powered by vBulletin® Version 3.6.8
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.

All content on this site is Copyright Protected and owned by its respective owner. You may link to content on this site but you may not reproduce any of it in whole or part without written consent from its owner.