Beaulieu-Optivaron Lens on Standard C mount camera

[carllooper]

There are plenty of Beaulieu C mount lenses on ebay (many with a free camera body attached) so am thinking these might be a good lens option for the C mount Logmar camera.

So I've picked up a Beaulieu-Optivaron 1.8 6-66mm Schneider-Kreuznach (with C mount).

I also have a couple of Lecia M mount Optivarons (and an M mount Cinegon 10 mm as well), but for the life of me can't find any M to C mount adapters for those lenses. I know that there are adapters made for Beaulieu camera but can't find any for sale.

Now the Beaulieu lens comes with a C mount thread (since the Beaulieu cameras for which it is built have a C mount) but does that mean the lens will work on any standard C mount camera (such as the Logmar), or is there something specific about the Beaulieu lens that means it only works at it's best on a Beaulieu camera? For example is the flange register for the lens the same as a standard C mount flange register?

In other words, would one need to make any fine adjustments to the lens (and/or use some adapter) in order for the lens to work at it's optimum sharpness on an otherwise standard C mount camera such as the Logmar?


C

[carllooper]

Have found the answer:

http://www.cinematography.com/index.php ... ntry229845

At wide-angle and fully open aperture, the lens may be a tad soft, so best to have it re-adjusted specifically for the Logmar. Or avoid that particular scenario and use a prime for wide shots.

C

[nikonr10]

There are plenty of Beaulieu C mount lenses on ebay (many with a free camera body attached) so am thinking these might be a good lens option for the C mount Logmar camera.

So I've picked up a Beaulieu-Optivaron 1.8 6-66mm Schneider-Kreuznach (with C mount).

I also have a couple of Lecia M mount Optivarons (and an M mount Cinegon 10 mm as well), but for the life of me can't find any M to C mount adapters for those lenses. I know that there are adapters made for Beaulieu camera but can't find any for sale.

Now the Beaulieu lens comes with a C mount thread (since the Beaulieu cameras for which it is built have a C mount) but does that mean the lens will work on any standard C mount camera (such as the Logmar), or is there something specific about the Beaulieu lens that means it only works at it's best on a Beaulieu camera? For example is the flange register for the lens the same as a standard C mount flange register?

In other words, would one need to make any fine adjustments to the lens (and/or use some adapter) in order for the lens to work at it's optimum sharpness on an otherwise standard C mount camera such as the Logmar?


C

Hi Carl C mount to leica M mount adapters are outthere !got one from ebay some time back for around 25 euros! have only used it with fixed leica lens from 35mm and up / ?if you wanted to go with a zoom would be quite heavy on the Beaulieu C mount to camera ? and strain on the mount , had no need to try this <
Think best bet is primes ,

[carllooper]

Hi Carl C mount to leica M mount adapters are outthere !got one from ebay some time back for around 25 euros! have only used it with fixed leica lens from 35mm and up / ?if you wanted to go with a zoom would be quite heavy on the Beaulieu C mount to camera ? and strain on the mount , had no need to try this <
Think best bet is primes ,

Thanks Nikonr10.

C

[nikonr10]

Hi Carl C mount to leica M mount adapters are outthere !got one from ebay some time back for around 25 euros! have only used it with fixed leica lens from 35mm and up / ?if you wanted to go with a zoom would be quite heavy on the Beaulieu C mount to camera ? and strain on the mount , had no need to try this <
Think best bet is primes ,

Thanks Nikonr10.

C

Carl just did a check ! The Leicina optivaron 6 / 66 mm will NOT fit the The beaulieu C mount to Leica M mount as the rear of lens is sticking out < so will not fit <
Hope this helps .

[aj]

Seems there aren't any M-lens to C-mount adapters. Odd as almost all adapters in the mountings-matrix are possible these days while so many manufacturers are active. And usually at friendly prices.
I bought recently a Nikon F to M-mount adapter which turned out to be nicely done.

There is an original orange boxed M-bayonet to C-mount adapter from Beaulieu. Which I have as it was in a box of parts I bought.

Legend has it that Beaulieu lenses must always be focused for the body. Collimated says the medicineman
Not all Beaulieux are equal. Even the presence of the gel-filter should demand a different setting.

So while the Logmar has a real pressureplate it certainly differs from the standard super-8 air-channel where the film isn't all that fixed in position. Considering all expenses made the lens is best tuned for your new camera. Of course testing first doesn't hurt maybe it is sharp in its current set up. Possibly Logmar use the same Optivaron and do they have recommendation.

This collimation is done using an infinity virtual image projector and eyepiece (collimator) to look down the focused lens. Without it you would need to use the viewfinder or a groundglass in place of the film. The lens is made sharp by adjusting the position of the rear retro lens along the optical axis. Shipping your gear to and from an expert is possibly not what you want and certainly will cost a bundle too.
You could send the lens to Logmar when they have a skilled man about the house

[carllooper]

Seems there aren't any M-lens to C-mount adapters. Odd as almost all adapters in the mountings-matrix are possible these days while so many manufacturers are active. And usually at friendly prices.
I bought recently a Nikon F to M-mount adapter which turned out to be nicely done.

There is an original orange boxed M-bayonet to C-mount adapter from Beaulieu. Which I have as it was in a box of parts I bought.

Legend has it that Beaulieu lenses must always be focused for the body. Collimated says the medicineman
Not all Beaulieux are equal. Even the presence of the gel-filter should demand a different setting.

So while the Logmar has a real pressureplate it certainly differs from the standard super-8 air-channel where the film isn't all that fixed in position. Considering all expenses made the lens is best tuned for your new camera. Of course testing first doesn't hurt maybe it is sharp in its current set up. Possibly Logmar use the same Optivaron and do they have recommendation.

This collimation is done using an infinity virtual image projector and eyepiece (collimator) to look down the focused lens. Without it you would need to use the viewfinder or a groundglass in place of the film. The lens is made sharp by adjusting the position of the rear retro lens along the optical axis. Shipping your gear to and from an expert is possibly not what you want and certainly will cost a bundle too.
You could send the lens to Logmar when they have a skilled man about the house

Thanks Andre.

C