• Welcome to Photrio!
    Registration is fast and free. Join today to unlock search, see fewer ads, and access all forum features.
    Click here to sign up

Grain focuser recommendation

Forum statistics

Threads
203,116
Messages
2,849,992
Members
101,676
Latest member
stasney
Recent bookmarks
0
So far no one mentioned that there are two kinds of grain-focusers:

-) with a ground screen

-) with an eyepiece focussed on the aerial image

The former is most easy to view, the latter gives brighter image with higher resolution
This has the makings of a long esoteric discussion about why aerial image focusing is so bad for SLR cameras, yet the most expensive enlarger grain focusers use an aerial image.
My take on it is that it is about magnification. When you magnify the ground glass image it becomes too coarse to use and the ground portion is also not a single plane. It is microscopic hills and valleys with ambiguous depth. Aerial image solves those issues, in exchange for a host of other issues.
 
The ground screens in grain-focusers are for direct vision, the ground screens in most SLRs are to by viewed by eyepiece (as with the aerial image).
 
Photrio.com contains affiliate links to products. We may receive a commission for purchases made through these links.
To read our full affiliate disclosure statement please click Here.

PHOTRIO PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Ilford ADOX Freestyle Photographic Stearman Press Weldon Color Lab Blue Moon Camera & Machine
Top Bottom