One way to see if your lens board is causing interference would be to measure the overall length of the lens mounted on the board, then take it off the board and measure again...
Type: Posts; User: JimL; Keyword(s):
One way to see if your lens board is causing interference would be to measure the overall length of the lens mounted on the board, then take it off the board and measure again...
I have not... I should have clarified - I was referring to the Copal Press shutters. Although the Prontor professional is self-cocking, would it be regarded as a "press" shutter?
The thing I don't like about the Press shutters is that when the lens is open using the preview lever, the aperture is automatically set to full open. This means you can't stop down to check your...
For many shutters on large format lenses there are no limits on the aperture lever's movement. It's normal for the shutter blades to be just visible at the large opening, and for the knob to move...
One thing you can do to reduce the load on the Jobo's motor is to rotate in one direction only. Flip the little white reversing arm by the drive gear out of the way. I use mine this way with Expert...
Looks about right to me... but it would be good if you took a similar picture with the front element installed and the lever set to f8. Neil and Jim's posts both describe how the aperture should...
Hi Bibbt,
The way the slide mechanism is designed, it needs to have some play in it to let the standards slide freely. It could be that the play you're seeing is how it came from the factory. The...
I might be able to give you some ideas. Is it the shift movements you want to adjust? Are they too loose or too tight? Does it involve the clamping lever?
It's a Copal 3S - I also have one (slightly different aperture) and it houses my Graphic Kowa 240...
The best situation would be if the shutter was from a 90mm f5.6 lens. With the shutter blades open, hold the lens at arm's length, looking straight at the front side. Close the aperture slowly until...
The question is, when the back is in the detent, is the ground glass square to the rails and parallel to the front standard? IIRC, front/rear parallelism can be adjusted at the front standard and the...
My guess is that it's a catch for some esoteric accessory that slides into the film holder space.
I don't have any problem closing the camera - the front standard is definitely hitting the hard stops inside the body, as opposed to the bellows preventing it from going all the way back.
FYI, here is a picture showing a rather well used OEM Wista bellows on the left and a set from Custom Bellows on the right. The height from the table surface to the top rim of the front plate is 17mm...
Good point, Bob...
The OP did state that he's bought a 4x5 camera, so it doesn't sound like 8x10 coverage is his priority. An Apo Sironar-S will also be a very expensive 1st lens...
Yes, the lenses are the same.
You could also buy this or, if you want something in newer condition: this.
A lightweight 300mm like the Nikkor M on a 50-60mm tophat extension board (going by memory here) will work fine with the normal bellows. The thinnest and best bellows I've seen are from Custom...
Yes, although most of the time I don't think about it as it's the image composition that's dictating rise/fall/neutral. With a lens of restricted image circle or a situation where you need maximum...
- On a Wista VX, you always use the track on the bed - the body track is fixed and only used for folding the camera. For short lenses, the bed extension slides back until it butts against the body...
Seiko had a shutter size with slightly bigger diameter cell threads (not sure if it was both front and back) than Copal 1 - both the older Fujinon 210/5.6 and 250/6.7 lenses came in that size. Later...
I was looking at this listing, which appears to include the shutter. Under quantity it says 10 are available. I couldn't see the listing you were looking at, and I would expect the price without...
Also available from the manufacturer on ebay (seller name 3s-krpc) for $2k.
Is there any provision for fine focus, or is focus done by sliding the standard by hand along the rail?
Aren't the Fujinon-W's 6 elements in 6 groups, so no cemented pairs? At the bottom of the OP's picture I can see a scratch by the notch in the retaining ring which tells me that the lens has been...
Calibration of the infinity position of the lens can be done using a groundglass on the film rails and a distant subject or diy collimation setup, and the EFL is known fairly accurately from the...
Leigh, if you could share any links to Rodenstock info it would be greatly appreciated! None of the brochures I've found have anything on principal points, etc.
I used Dan's formula to make an excel spreadsheet and redo the helical calibration for my home-made 6x9 camera with 58mm SA XL. The focus mount is a Fotoman, marked for 65mm. I had previously used...
I don't think you need to worry about nodal points too much. You're calibrating infinity focus by eye on the GG, and then you want to mark various distances closer than infinity. Using the formula...
I've used the thin lens equation to calibrate helical mounts. Solve for image distance i. Then, i - focal length = incremental distance the helical needs to move from focus at infinity.
FWIW, the diameter of the front part of the board in my picture is 106mm.
Looks like part of a Sinar board... for taking a Sinar DB board and making it into a board for a shuttered lens.
168827
You can tighten the ways by loosening the clamping screws on one of the dovetails, holding it with a bit of inward pressure and retightening. The vibration is probably from sticky old grease, so...
You need to undo the 3 screws on the front and take the helicoid apart...
The off-center aperture is something I've seen in some later Copal 0 shutters with 7 blades (vs. 5 blade variants). The 7-bladed mechanism seems more prone to this, and it's most noticeable at the...
Where are these converters available?
My search only turns up adapters to put a #00 shutter in a board with a #0 hole.
Sounds like a press shutter. When you fire the shutter, do you cock it first with a lever or just depress the cable release until it fires? The press shutters keep the aperture fully open, I assume...
Mine measures 57.53mm... S/N in the 10 millions. I bought the shutter and cells separately (lucked out on the right shutter... I think) and also wondered whether the spacing was off after looking at...
The Seiko shutter may not be compatible with a Copal 1. I've had a couple of these lenses with Seiko shutters and the threads were different (larger outside diameter and coarser pitch) than a Copal 1.
If your Fujinon 210 is the older style in a Seiko shutter, the shutter may not be a Copal No. 1 size. It seems that, early on in this lens' production, Fujinon used a shutter size with larger front...