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The other day I actually managed to make a 75-80mm lens that covers 4x5". It's built out of some of the front elements of a Pentacon 200mm f/4 (35mm format) and the rear element group of a Schneider...

So, any ideas on what might be considered to be the amount of money that a prospective buyer could be expected to part from in acquiring this lens?

edit: Not implying that I intend to sell this...

Not exactly mounted (in)to a shutter but yes, I've found this to be one of the best ways to go about it.

Amazing piece of photographic equipment, that Sinar central shutter. I buy my lenses where...

Some pictures.

http://img820.imageshack.us/img820/9803/berthiot5706.jpg

http://img695.imageshack.us/img695/1042/berthiot5707.jpg

http://img163.imageshack.us/img163/2249/berthiot5711.jpg

I have owned this lens for three years now. I've taken a few shots with it but mostly I've neglected it. It really is a fantastic piece optical technology.

I've been trying to figure out, well,...

Anything liquid is out of the question. Consider plain graphite, but only in tiny amounts to avoid graphite dust inside the septums.

Came upon a German tripod labeled H.J. Riess on my flea market tour today. Quite the bargain really. Came with a Sinar pan/tilt attached (all tabs are intact) and cost me 50 euros. Everyone knows...

It's basically a very large and sturdy iris that can be locked in place. It simply clamps on to the lens threads. Fantastic gadget. No need to carry all those lens boards along anymore.
...

The use of lens movements has been rising steadily on television productions in the last few years. At least in Finland, it is not uncommon to see some movements used on commercials.

Also, the TV...

Welcome to the forum, although, judging by your posts here and on FM, I doubt your stay will be too long.

Have you considered actually using that camera? I know, it may seem like a huge jump to...

Hard to say from a small picture like that but it sure looks like something was distorting the optical path. I think I've gotten something similar with waterdrops and a large aperture (on small...

As it happens, I just bought this lens (209mm f/8) at a camera fair for 10€. For narrow DOF, you could try taking off the aperture ring and removing the screw that limits the aperture to f/8. The...

Both links are dead.

I always thought it was as if Wollensak was letting everyone know that they didn't need reviews/criticism and that users knew what they were buying (the best).
I can't quite put it into words but I...

I can see where this is going. Next thing we know, large format is under antiques.

That's if you buy glass filters from the likes of Hoya and B+W. I think Robert was talking about gel ND filters. A lot cheaper and not that big of a burden to use when you're already lugging around a...

I'm not sure if this is the right place to sell stolen gear.

I see a formidable business opportunity here.

EDIT: By the way, there appears to be one on eBay right now: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270154673104

A block of aluminium with a peg? You sure you're not pulling my leg here? How's it work?

Yes, well, I suppose that's a solution.

But how on earth are you able to grind the microscopic cams to such precision? Do you have something like a cannibalized Polaroid turned into a grinder?

There's something I've been wondering.

Since the film plane has to be moved away from the original film plane to achieve 4x5" coverage, how do you deal with the issue of lens placement?
The...

Yeah, well, cinematography is a whole different animal. With changing composition, the results should be consistent from frame to frame. Unintended flare popping up mid-scene is not what you want in...

The point is that the light that isn't used to form the picture is going somewhere and those somewheres have the potential of bouncing the light so that it fogs the film.

I don't see why...

Teflon spray sounds like a good idea. And I agree with BradS. Graphite works better than other lubricants in many photographic situations but this is definitely not one of them. Dust is a PITA for me...

The great thing about Sinar is that you can take a regular bellows, attach it to an accessory standard and use the clamp rod thing to attach it to the front standard. Add a bellows hood mask unit to...

I love my 120/8 Super-Angulon on 4x5". It's a nice general wide-angle with lots and lots of room for movements. Always in the backpack.

Pardon my obviousness but why leave it in a car, on a hot summer day, in the first place?

I use a 90 degree spirit level against the ground glass. Perfect verticals every time with no modification of the camera.

Looks like the crop-factor debate plague is starting to get a foothold with larger formats. Let's just hope it doesn't spread further.

In case you didn't notice, the question was how to install flanges. Not how to use retaining rings.

Consider picking up an older Quantum Calcu-Light XP exposure meter. It can accurately measure (Reflective and incident metering) down to about -7EV (ISO 100)

Dust and scratches are great if there aren't too much of them. They usually make lenses sell cheaper and I have no problem with that.

Obviously, if you're the one selling, they're not such a good...

That's what I like about Sinar. Everything is metric (cable release, screws, etc.). No imperial entanglements.

What is this oversensitivity with lenses mounted on shutters? What could possibly go out of alignment when screwing the cells in and out? It's not like you're moving the actual elements within the...

Not sure if a shutter is the best way for pinhole photography. With ultra-wide focal lengths the shutter might vignette due to the thickness.

What do you mean? Cell size or board hole size? I don't think any of the Graflex shutters are standardized.

Here are some Copal size charts from SKGrimes' website:...

Exactly. The old single-coated convertible Symmars are great if you're on a small budget. Especially the 240/5.6 is a useful lens as you can remove the front cell and use it as a 420/12, although you...

A paper focusing target (preferably made of thin paper) between a flashlight and the camera works wonders.

Just a bunch of old worthless lenses.

90, 125, 135, 150, 180 x2, 210, 240, 360

90mm and 135mm are Optars, the 125, 150 and 180 are Dagors, the 180 and 240 are convertible Symmars and the 360...

Bummer. I have in my mind the most beautiful photograph at this one very special spot near where I live but I've been absolutely swamped with other things for the past month.

How many spots to go?