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View Full Version : Big Dallmeyer at LeicaShop covers 20x22"



CCHarrison
14-Mar-2014, 07:03
Just posting because so many folks here are on the search for big lenses - no affiliation with LeicaShop


http://www.leicashop.com/vintage_en/dallmeyer-no-11-22x20-rapid-rectilinear-sku23367-1.html

Dan

Steven Tribe
14-Mar-2014, 12:13
Size no. 11 must be the 33" focal length - the longest one available.
The 22x20" is for "groups or portrait", whilst "view or landscape" is up to 25x21".

Emil Schildt
14-Mar-2014, 12:41
Just posting because so many folks here are on the search for big lenses - no affiliation with LeicaShop


http://www.leicashop.com/vintage_en/dallmeyer-no-11-22x20-rapid-rectilinear-sku23367-1.html

Dan

and then there is this:

http://www.westlicht-auction.com/index.php?id=4&L=1

and this... (going high,,,)

http://www.westlicht-auction.com/index.php?id=4&L=1

alex from holland
14-Mar-2014, 13:06
Is this f8 or f6?

Steven Tribe
14-Mar-2014, 13:12
F8.

Emil, your links are just the auction summary page?

alex from holland
14-Mar-2014, 13:15
Found it already, but thanks. Its a 30" aplanat.
Still searching for a f6....

brandon13
14-Mar-2014, 14:04
Alex didn't you get that Dallmeyer 8D? Or did I miss something.

Emil Schildt
14-Mar-2014, 14:28
F8.

Emil, your links are just the auction summary page?

sorry about that..

lot 513 and 528...

alex from holland
14-Mar-2014, 14:33
Oh yes i did. But to be more mobile an f6 aplanat would be welcome.

goamules
14-Mar-2014, 16:30
Oh yes i did. But to be more mobile an f6 aplanat would be welcome.
I believe a 30" Dallmeyer D model F6 Petzval and a 30" F6 Aplanat would be exactly the same size.

Monty McCutchen
14-Mar-2014, 18:42
Garrett you know much more about these lenses than me so this is as much question as statement but the 8D is a 37 inch lens (I know it's billed as a 30 inch lens but the different billings at least as I understand it come from measuring from the front or the back elements) wouldn't that makes Alex's quest for a different size lens? Or am I missing something?

Monty

alex from holland
14-Mar-2014, 23:19
A 37" 8d is HUGE. A f6 aplanat covering the same size is a lot smaller and more light weight. So more fliexibel.
But they will also produce a different "look".

Dave Wooten
15-Mar-2014, 14:32
So for a head and shoulders portrait with lens...I would need approx how much bellows?

Taija71A
15-Mar-2014, 16:58
So for a head and shoulders portrait with lens... I would need approx. how much Bellows?

_____

In order to answer your question (*More accurately)... You would first have to tell us the 'Magnification' that you are trying to achieve.

where...


Magnification (Image Size divided by Subject Size) = M.
Focal Length of Lens = F.

___

'quick and simplified' formula...


Bellows Extension = (M+1) x F .

*Be sure to use the same units for all of your Calculations (Such as mm. or inches).

____

For further reading...

http://www.largeformatphotography.info/forum/showthread.php?9183-magnification-formula

http://photo.net/learn/optics/lensTutorial#part1

--
Best regards,

-Tim.
_________

goamules
15-Mar-2014, 17:44
Garrett you know much more about these lenses than me so this is as much question as statement but the 8D is a 37 inch lens (I know it's billed as a 30 inch lens but the different billings at least as I understand it come from measuring from the front or the back elements) wouldn't that makes Alex's quest for a different size lens? Or am I missing something?

Monty

My mistake, I didn't look up the focal length of the 8D. I thought someone said it was 30" in this thread. So a 37" F6 would be slightly larger than a 30" F6. But if you compared two equivalent focal length F6 lenses, even if one was a Petzval and the other an Aplanat, they would be the same physical size.


A 37" 8d is HUGE. A f6 aplanat covering the same size is a lot smaller and more light weight. So more fliexibel.
But they will also produce a different "look".

Now I understand you were looking for a smaller focal length. Aplanats/Rapid Rectilinears are wider coverage. Similarly, an F6.3 Protar VII that covers the same plate as an 8D would be even smaller and lighter. Usually, we think of the slower lenses covering more. But some of the angle of coverage is also based on the design. A Protar V and a few others being very wide, about 90 degrees. A Petzval is 35 degrees, if I recall correctly.

Dave Wooten
15-Mar-2014, 17:59
_____

In order to answer your question (*More accurately)... You would first have to tell us the 'Magnification' that you are trying to achieve.

Th

where...




Magnification (Image Size divided by Subject Size) = M.
Focal Length of Lens = F.

___

'quick and simplified' formula...


Bellows Extension = (M+1) x F .

*Be sure to use the same units for all of your Calculations (Such as mm. or inches).

____

For further reading...

http://www.largeformatphotography.info/forum/showthread.php?9183-magnification-formula

http://photo.net/learn/optics/lensTutorial#part1

--
Best regards,

-Tim.
_________

Thanks
T
I was referencing the 37 inch lens in the post.

Taija71A
15-Mar-2014, 18:10
... I was referencing the 37 inch lens in the post.

____

Dave, if you clear your 'In Box'... I can answer your question.

Thank-you!
_________

Dave Wooten
15-Mar-2014, 18:20
Thanks,
I think it is clear now?

Dave Wooten
15-Mar-2014, 19:25
Thanks,
I think it is clear now?
Thanks so much for the info