Help Please! 14" Goerz Apochromat Artar will not focus

[E. von Hoegh]

I see no reason to send the lens back and I doubt anything is massively wrong with it. You've got what, 4 major lens groups to worry about with only 2-3 real ways to screw it up? Seems like you could just exchange elements around until you have "sharp enough" images. Although not razor, the lily looked fine.

Great idea.:confused:

An Artar is capable of 100+ LPMM under the right conditions. "Sharp enough" isn't.

 

[E. von Hoegh]

Great question - I did not realise they were different. The inner lens do not have any pencil marks, so I will label them myself and take 2 photos to compare. Should these be at infinity or is closer up ok? Infinity photos are problematic at the moment, so I would prefer a stobe illuminated target.

Look up a diagram of an Artar and check yours. I can look at one of mine and tell you which way they go tomorrow. Close up will be fine.

 

[clayne]

Great idea.:confused:

An Artar is capable of 100+ LPMM under the right conditions. "Sharp enough" isn't.

Contrary to popular belief the lens is not imbued with magical powers and assembled by elves in the forest. I'm sure he can get it back together and up to snuff again. Take control.

 

[shutterfinger]

From A Lens Collectors Vade Mecum
C.P. Goertz, Berlin, Artar and Diaylt .

 

[mkillmer]

I labelled the inner lenses "A" and "B" and took the same picture with each configuration:

..."A".."B"...
() )( S )( ()

and

..."B".."A"...
() )( S )( ()

Pictures are a bit rough - but they are typical of how I plan to use the lens...
A-B:
http://www.flickr.com/photos/9314116@N06/9500602365/
A-B Crop:
http://www.flickr.com/photos/9314116@N06/9500604501/

B-A:
http://www.flickr.com/photos/9314116@N06/9500616557/
B-A Crop:
http://www.flickr.com/photos/9314116@N06/9503419936/

Yes - I should have used a static scene. There is variation due to the model moving between shots.