Home

Please support mflenses.com if you need any graphic related work order it from us, click on above banner to order!

SearchSearch MemberlistMemberlist RegisterRegister ProfileProfile Log in to check your private messagesLog in to check your private messages Log inLog in

C.P. Goerz Dopp.Anastigmat 4.5/90 @ EOS 5D
View previous topic :: View next topic  


PostPosted: Thu Apr 01, 2010 6:33 pm    Post subject: C.P. Goerz Dopp.Anastigmat 4.5/90 @ EOS 5D Reply with quote

OK, first some information about Goerz:
http://tinyurl.com/yfuur4s


I have adapted this old Goerz lens using bellows to my 5D which looks like this:


This lens is typical for lenses that were produced at the turn of the 19th/20th century: low contrast, prone to flare, good core sharpness but distinctive glow. The optical aberrations are only corrected partly.

But let me present you some shots that show what I mean:

First an "original" image (JPEG, out of cam) and then a post processed one, just some basics during RAW development, nothing fancy.













And finally some 100% crops to show the "glow" of the lens:





PostPosted: Thu Apr 01, 2010 7:43 pm    Post subject: Reply with quote

Double-anastigmat and f/4.5... well, with the exception of super-exotic designs there are only 2 possibilities: it could be double-gauss lens or dialyte (currently better known as helioplan). I know Goertz used dialyte design under name "Dogmar".

Anyway, both double-gauss and dialyte have 6 inner air-glass surfaces. That's too much for uncoated lens - according to many collectors 2 inner air-glass surfaces produce good contrast (protar, dagor, ernon), 4 air-glass surfaces produce acceptable contrast (e.g. triplets, hektors, heliars, or early sonnars) and 6 air-glass surfaces are on the low side (double-gauss, dialytes - dogmar, helioplan, veraplan, unofocal..., planars)

I'm going to try old uncoated Helioplan - I think it will produce very similar images to your Goertz lens Smile

Thanks for nice presentation!


PostPosted: Thu Apr 01, 2010 8:24 pm    Post subject: Reply with quote

Absolutely stunning samples, Lucis with such a wonderful looking piece of glass! Excellent work!


PostPosted: Fri Apr 02, 2010 1:42 am    Post subject: Reply with quote

Still with digital photography contrast is easily corrected and as a plus you have a very distinctive and realistic "lighting" that you cannot achieve with modern lenses. Look how the light fall on those tree branches and the resulting tridimensionality.
Parodixacally modern lenses are good if you use positive film or shooting jpeg, if you shoot raw and post process the contrast later low-contrast lenses have an advantage... but don't tell this around or prices will raise Razz


PostPosted: Fri Apr 02, 2010 9:20 am    Post subject: Reply with quote

Beautful series.
Good to show the possible PP in Photoshop.
Happy easter. Very Happy