Coverage of this particular dagor

[Former Member 8144]

Hi all,

I'm looking at buying Eddie's 8 1/4 inch dagor but I'm trying to find out the image circle to see if it will cover 8x10 with some movements.
Eddie knows I am posting this topic.

So it's an 8 1/4 inch F6.8 dagor.
Serial number is 756...

You can see the actual lens on eddies for sale post.

If anyone has used this version of this dagor lens on 8x10 can you let me know what the IC was like.

Thanks for the help,

Marc

[CCHarrison]

IF you check out the Goerz ads on my page here

http://antiquecameras.net/1904goerzlensads.html

You'll see the 8 1/4 covers 8x10 "sharply", but not until f/62

Dan

[IanG]

Dan, my Goerz Am Opt data from a Gerz catalogue shows the 8¼" as covering 5"x8" at f6.8, 7"x9" at f16 and 10"x12" at f45. That means the lens should be covering 10x8 by around f22/f32.

I'd add that the same data for the 12" matches the performance & coverage of my own Dagor.

Ian

[Robert Hughes]

For some reason, I'm reminded of that Jimi Hendrix song about the photo-taking groupie... Dolly Dagor!

[CCHarrison]

Hi Ian,

I dont doubt you, but I am just reading from the specs in a 1904 catalogue. And note, that it states to 'sharply' cover 8x10 it needs f/62...

Dan

[IanG]

Dan, I suspect the Dagor was improved as new glasses became available, both sets of coverage figures we've referenced come from Goerz themselves.

By 1913 Goerz AM Opt where showing the Dagor 8¼" as sharply covering 10"x12" at f32, using exactly the same wording "size of plate sharply covered".

It would be interesting to see how much difference there is in practice between the very early Dagors and later lenses.

Ian

[eddie]

i believe the later dagors covered a bit less as the design may have be changed slightly and the shutters may have cut the coverage as well. the series III brass lenses cover way more than the others.

[Jan Pedersen]

Marc, Ian and Eddie got it right, the "Modern" Dagor has less coverage than the older series III lenses.
Whether the serial number is in the 75xxxx range or above 77xxxx makes no difference except that any Dagor with a serial number bellow 77xxxx is not coated unless it was custom coated.
I did quite a bit of testing of my 210 Dagor and a Fuji 210 (Old Model with 352mm IC and found the Dagor a much better performer, particularly at infinity where the Fuji is a dog. As far as corner sharpness with both lenses, i can't tell since i contact print on 8x10
I have 4 Goerz Dagor lenses, all coated some with some gold and some not. One day i will be shooting with nothing but Dagors.
They are stellar performers. Some will disagree. (I know a few)

[ljsegil]

The uncoated Goerz DA III 210/6.8 is a beauty, covers 8x10 in good health, and can light up a scene like nothing else that I know when you hit its magic spot. To take nothing away from Eddie's lens, a venerable special in its own right.
DA III scene attached (shot wide open at f/6.8, late afternoon sunlight).
Larry

[Former Member 8144]

That's a very painterly image..just my cup of tea!

So is the DA III an earlier version of this lens?
Do they have specific marking on them..i.e. DAIII or do you just need to know by serial number etc?

I've had to put off my lens purchase for a few weeks but good to know what are the good options in the wide end of 210-250 spectrum.

Marc