DB Lenses & Shutter || Super Film Support
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- čas přidán 6. 08. 2024
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Nice video!!! I love to work with Sinar gear and I already bought a Schneider Kreuznach 80mm f/5.6 Apo-Digitar M (macro specialist) for a good price in B&H just because it was installed in a Sinar DB board. I changed moved the lens to a proper Copal shutter, keeping all the dimensions the same (so optically nothing changed), I really enjoy the quality of this lens. Now it's been used more with a Cambo Actus with a Sony A7R3, but in the past I used it a Sinar + Hassleblad digital back combo, with awesome result as well. For the f/stop when I made the change I used an Konica Minolta sensor to measure the light and rearrange the aperture marks, but now with the Sony this is lens relevant because it is so simple to check the final result and make adjustments.
Sinar DB, DBM (manual setable aperture), mounted are designed to be used as part of the Sinar shutter system which automatically stops down the lens to the aperture setting once the film holder is installed into a Sinar camera set up with the Sinar shutter and related system parts. This is a huge time and error saver for studio view camera users back in the day when commercial photography was married to using a monorail view camera... for a long list of reasons (over 100 sheets of 4x5 color transparency film per studio day session was common back then, winding up the shutter that many cycles and stopping down the lens becomes no small task). Since those commercial users of the Sinar system has essentially gone away today, these Sinar DB mount lenses have become common as they require the Sinar shutter at the least to operate properly. Back in the day, one can send their lens in shutter to Sinar or a certified Sinar service center to convert it to Sinar DB or DBM mount. The lens was specially fitted to the specific Sinar DB or DBM mount matched for proper optical performance. What has become extremely common today, camera dealers-sellers will acquire a Sinar DB or DBM mount lens, then move the lens cells to some shutter they have acquired resulting in a Fraken-lens of questionable optical performance. Hint of this lens history could be found in the shutter's aperture scale which is often not oem or properly matching to the lens in question.
yes, but a good way to think of them is an 'olden day' version of Phase Ones xt's x shutter, there it is electronically controlled through the digital Back (think DB)- as most digital backs {from MF, like hasselblad, leaf, mamiya} have an electronic shutter in them ( that is they scan, NOT open a curtain or leaf system)- or if you adapt a Fujifilm GFX body to them, then you use the camera body shutter ( in the GFX) so, like a plate camera, all you need is a "barrel lens", nothing but aperture control ( standard system, or waterhouse stops , a plate with a precision hole in it, inserted like a filter holder in a large telephoto lens for 135 cameras), and this 'aux' shutter does the timing a simple way to think of it.
If you have a Schneider lens go to their site and get the specific measurements for that lens. I'm referring to the overall length. Then measure your altered lens and see if it is the same, that's where shims come into play.
great idea, and thinking, but one disadvantage, is that if this shutter breaks down, NONE of your lenses work, so the shoot is over!, unless you bring another lens with a copal shutter attached as a backup.
I have a Schneider 300m with a manual aperture board that I use without a shutter for paper negs and slow glass plates. It works well but the manual aperture boards are rarer. It would be a great cheap combo of you are looking to do wet plate. Also I have a Schneider 240mm Symmar that is not a standard copal shutter size. Well I actually have two because I bought a second with bad glass for the shutter. One useable combination and one paperweight and price was about what I'd have paid for a working lens and shutter anyhow! So beware not all lenses are copal thread sizes.
one good feature of this DB shutter and lens system, is that on this shutter the preview lever, is also supplemented by a cable system to the back ground glass plate, which has a lever inside, when this is moved by a film holder the shutter shuts, so NO worries about this "amateur mistake", that is what the lower threaded fitting is for!, the center is a pc connection for flash, the upper one, at 9:00 position is for the real shutter cable release, to fire the camera.
I, for one, think that the Sinar behind the lens shutter and their DB lenses are the best option. Ever. By far. Hands down.
You buy just one shutter and simple, cheaper, reliable lenses with no parts to break. The system is cost effective, easy to manitain and great to use. Also, you do not need to worry about each and every copal shutter becoming slightly out of sync or compensating for individual shutter errors. There is no problem of the whole lens becoming wasted just because of the shutter malfunction.
Also, the Sinar behind the lens Shutter is self-cocking, so you do not need to touch the front standard or the lens at all, just fire at will with no cocking. Aperture and time changing is also much easier as you have huge scales easy to see and operate from behind your camera. The Sinar shutter and DB lenses offer the level of the comfort completely un-obtainable with small copal shutters.
Thanks. I have lots of DB lenses and my shutters are kaput!
I was under the impression that even manual aperture control on these isn’t guaranteed and required the shutter. Is that right?
Haha I literally added that Sinar to my basket to research the deal with them .
Hey, good video but I have a special case...
Can I use a Sinar DB lens if I don’t need a shutter because I’m using an adapted Fujifilm GFX digital camera as a back? How do I manually operate the aperture? Is an DBM Lens board necessary?
You are right, a collimator :-)
Ha! I get one right once a year or so!!
Anthony here. Thanks for the answer - I'm going to take your advice and not go that route ;)
Glad it helped!
one thing to add is that copal 3 and copal 3s are not at all interchangeable because they have different sized threads. be aware and be careful
DB lenses - don't buy! Thats my ebay scrolling alert thinking :D. Great video as always.
Exacto! I should have made a video in 5 secs, DV shutters, dont buy. Thanks
@@NicosPhotographyShow Nooo we like looong ones! I wish I watched this like 5 years ago, I have bought some DBs and also few frankensteins...it was pretty annoying. Since then I rather spent time to do research, checking tech infos on them, but rather like manufacturers data sheets. Some LF forum informations may be incorrect sometimes too. Or watching your videos! It is great to see content alike Nicos, very very helpful for many people.
im gonna convert a 90mm from DB, since I already have the lens elements. got the lens for free also
DB lens without DB shutter- no savings. DB shutter and 6 DB lens - savings . DB shutter and a dozen process lenses ,old barrel lenses ,brass lenses , enlarger lenses - the savings are great ! In no time you are end up 3 dozens ridiculous combination :) - ( Mechanical , Copal DB shutter )
Exactly, its great if you are willing to get full into it. But for one lens combo its overkill.
Aun no estas en los bosques?
By the way, COPAL- one and only japanese shutter manufacturer. They hold all shutter mechanism patents. So, where is no sense to discuss which brand shutter is better (CaNikon, Fuji, Pentax, Sony and others)...They all made by COPAL:-))