Kent, I use cup-shaped adapters to mount fat lenses to small boards. An alternative is a 2- or, more likely, 3-piece board. Three pieces, with the middle piece somewhat smaller than the one that attaches to the camera so that there's room for the sliders.
About heavy lenses, I hang heavy lenses completely in front of the board, use a crutch to support them. On my Cambo, the crutch is a mutilated front standard. An inexpensive lab jack would have done as well and cost less.
Thanks. Not yet! I only got it recently and most of my free (photography) time lately has been taken up with making various adapters, and adapting lensboards. Will let you know when I have.Originally Posted by diversey
Well, they say size doesn't matter but that is mighty impressiveShame it has no magical qualities.
They do say (in smaller formats anyway) that a really worn lens can be a good sign.
That's still a mighty lens. Many thanks, added.
My current LF cameras are a Canham 5x7 and a Sinar P2. The latter gets little use, but it put me on the path of Sinar compatability / adaptability for larger barrel lenses. I decided to make a step-up adapter (Canham to Sinar), sacrificing a lensboard from each camera and bolting them together with a square of ply (18mm/0.75") between (obviously with a large circular aperture cut out).
Now I can mount a Sinar shutter, a somewhat stripped down Sinar 'universal' standard, and lenses on Sinar boards. The Canham copes with the weight remarkably well (all hung 'off the front') and is rock solid. And the entire rig is far, far lighter than the P2. Can take some shots to illustrate if you want.
The Canham has thin plastic (nylon?) washers between the metal surfaces, maybe this helps with 'bite' to keep the surfaces from slipping against each other? You could try adding the same to your Korona.
Heavy lens support.
This will not work for everyone. I like Dan's crutch support better. Well, here is a test bed I used once with a Sinar Alpina. The bed was designed as a camera support for a large telescope. One sold on the big auction site for $15.
Last edited by Jac@stafford.net; 1-Oct-2018 at 15:00.
480mm f4.5 Schneider Xenar on 5x7_13x18cm Sinar P2.
342mm f4.5 Cooke Aviar, all brass and Heavy, on 5x7_13x18cm Sinar P2.
Sinar P front standard handles lenses like this with ease and stability. Sinar shutter allows barrel lenses like to be used with equal ease.
Trade off, the entire outfit is HEAVY.
For novelty, have a 36" f8 Perkin Elmer aero recon lens in Fairchild K38 shutter and a 24" f2.5 Aero Ektar in the same Fairchild K38 shutter. These were purchased in the late 80's, for very little $. Very few wanted them back then. Images maybe later.
Bernice
One of the lenses I have handy is my 16-18" Graf Variable. This lens come in at 5# 9 oz. It fits on a 6 inch lens board and projects back in about an inch and a half. The lens is 5 inches in diameter I use it on the studio camera and it has been out in the field once but it did strain the front standard of my walnut 8x10 that I built.
I have a couple -
A big Kranz Petzval (approx 480mm) fitted on my big Gandolfi Imperial (12x15)
And a huge Jamin/Darlot cone lens - I have made images in 16x20 with this one..
Wow that Xenar is big... it takes something to fill a Sinar board like that... Can you weigh them?480mm f4.5 Schneider Xenar on 5x7_13x18cm Sinar P2.
342mm f4.5 Cooke Aviar, all brass and Heavy, on 5x7_13x18cm Sinar P2.
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