Need help to adjust Kalart Rangefinder on Graflex Crown Graphic

[tom thomas]

The Kalart rangefinder on my Crown isn't anywhere close when the image on the GG is perfect focus at infinity. The infinity stops appear to be correct. The range scale agrees with the focused image at infinity as well. I'm using steep roof peak of house at least 1/2 mile away for infinity.

I'm having problems understanding the procedures for adjusting the cam. I do have the Kalart manual which describes how to do it but very confusing. The manual says to focus at infinity using the Rangefinder "first." Mine won't focus anywhere along the rack.

It also says that the Pacemaker Graphic camera's must have the track racked forward to access the adjustment cam on the right runner of the camera track. A photo in my manual shows the arm on the rangefinder shaft making contact with the cam when the track is racked all the way forward. No so on mine. There is about an inch between where the arm stops and the cam when it is racked out enough to make the adjustment. Same thing on a 23 Speed Graphic.

Do I check focus, rack out all the way, adjust cam, rack back into the infinity marking, check, then repeat process?

Or is mine out of whack inside the rangefinder housing itself?

Tom

[tom thomas]

I had to end the thread to start dinner. I'd mentioned that the cam arm that normally contacts the cam is about an inch away inside when the track is racked out. Same on another. The arm is stopped behind the pivot arm that secures the cover and track so it loses contact with the cam long before the track is racked out all the way. The picture in the manual shows the arm contacting the cam when the track is all the way out.

I included a photo in my first post. My second question is which four screws hold the cover on. Are they the two on top and the two on the bottom. Or the one in front and the rear at the top of the flash mount?

Dinner is ready.
latr, tom

[banjo]

hey go to http://www.graflex.org
then to Speed Graphic,
then to Kalart Side Mounted Range Finder

Kalart Side Mounted Range Finder [Up to 1955}that where you can find 3 different adjustment procedure

[Wayne Crider]

http://graflex.org/speed-graphic/kalart-manual.html
The description I used to set mine up.

If you focus the RF to infinity you adjust the infinity stops for infinity on the GG; This of course with the bellows drawn. I racked my rail in all the way as you will probably not get both ends, infinity and close distances perfectly correct, so set the Kalart for closer distances with the racked in rail for infinity. You must make range-finding adjustments by measuring your distances to an object. Get out a tape measure.

The arm should not contact the cam when the rails are racked forward all the way. It doesn't on a 4x5. With the rail out that far the Kalart could never adjust to such a close distance even if it did.

It's really a do it, and do it again adjustment till your right or close enough. Hope this helps.

[tom thomas]

thanx Banjo. I'd been there already, and any other site offering adjustment help. They each just say to rack the lens frame forward to access the adjustment screw. When I do that, the arm on the rangefinder itself is about 1 inch back and no longer making contact with the cam. I even tried to move the lever arm itself while looking throug the rangefinder. It never focuses, off about an inch, ie distance between the two images that should overlap at focus.

The picture in the online Kalart adjustment manual at graflex.org, (like my manual) shows the arm contacting the cam when the track is racked out all the way to allow access to the eccentric screw. Mine is back about an inch, on two different cameras, not longer making contact with the cam.

Has anyone else encounterd this while trying to adjust the focus at infinity?

The screws on the rangefinder have some black paint over them, not original. I have to wonder if someone didn't misadjust the rangefinder and then only using the ground glass to focus.

I'm hoping to use this camera with the 120 23 roll film adapter so was going to try to use the rangefinder. Can't right now.

tom

[Frank Petronio]

I've tried adjusting the Kalart rangefinders before and given up. I think there is Voodoo involved. I've sent them off to be calibrated by experts and while they work, I never found them trustworthy enough for closer, short focus work. The old press photographers used flashbulbs and f/16 for good reason!

I have to laugh at the dudes who think they can shoot an Aero Ektar at f/2.5 from five feet away solely by using the rangefinder... haha right.... But for medium distances and reasonable apertures go for it.

[Ivan J. Eberle]

I have an levered arm that connects the Kalart to my Meridian 45CE. It was frustrating trying to adjust until I realized the collar that attached the arm to the thru-pinion shaft of the Kalart had slipped. Finding the right initial setting for this and then putting a flat on the pinion shaft to secure the collar was a crucial first to adjustment (once I'd installed a new split image semi-silvered mirror, that is).

Another adjustment that I needed to do to get coincidence at infinity was the screw under the prism.

Jo Lommen's Kalart Adjustment page describes the process pretty well, at least from a Graflex perspective, FWIW.

Also, a red LED laser greatly speeds up and simplifies the adjustment routine.

[tom thomas]

Frank, I'm just about ready to agree with you. Adjusting rangefinders isn't easy, especially with the 1950's tech instructions out there.

Banjo and Wayne, I have a slightly newer edition of the Kalart rangefinder manual than the one you've referred me to. Adds better instructions for adjusting Linhof's, Press KIngs, Busch, etc but same lack of good instructions for the Graflex.

I've also hunted all over the web for instructions. I did find a nice infinity chart at http://southbristolviews.com which allows one to set infinity in the rangefinder with the camera lens 12 and 24 inches away.

Obviously can't set the GG infinity on it but after verifying GG focus at infinity, it is easier to work with rather than standing out in cold rain adjusting the Kalart. It still doesn't help with this camera. I can see the two stars moving together and the word parts of Infinity between to move together but they stop about 1 inch from correct adjustment. I checked my 23 Speed Minature and it is very close so I know the chart works, I also checked a 23 Speed Graphic which is close but needs some adjustment. It has spring back with a 120 roll adapter mounted. I didn't want to take the time right now to verify just how far off.

I did measure the distance from the film plane to the front edge of the lens on all three cameras as the Crown bellows extends out quite a bit further than the two Speeds. All are 4/25 inches give/take my eyeball so the racks/infinity stops seem to be near correct on all three. All three have the Ektar f4.5/101 lens in Kodak Flash Suprematic so comparable I think.

Wayne, I checked infinity with the rack all the way in, lens/bellows slid out to the Infinity stops. When clearly focused, the rack is out about 1/8" inch from rear stop. Infinity marks line up at this point so agree with the GG. Would it be worthwhile to loosen the screws on the infinity stops, rack in the remaining 1/8 inch,tighten? Probably won't help as the rangefinder is way out of whack.

But, the movable rangefinder image of focal point (building peak) is about 1 inch low in the viewfinder. Won't adjust anywhere near right even running the track all the way out and back in. I can see it moving a bit but stops long before approching Infinity. So, I guess the rangefinder needs internal adjustment.

Or the actuator arm is badly adjusted which still means internal adjustment is needed. Right? I'd like to take the cover off but not sure which screws to remove. Two on bottom, OK, but not sure which ones on top. My camera has the Optospot mounting option with the little cover held by a screw. Do I remove the two screws on top or the two on the front and rear sides. I don't want to have any loose pieces rolling around.

I'm just about out of time to fix it. Leaving for France in one week so have wife dictated priorities, ie packing.

I do have a neat little portable rangefinder, called an Ideal Rangefinder that agrees perfectly with the GG and the range scales on the track. I can always use it and the eyeball plus F-stop to get close. I only plan to use the camera for landscape, perhaps as close at 10-15 feet. No close up portraits work so perhaps I can get by.

This camera does have the Graflok back though so I could use tripod, remove the 120 film holder, install GG back, focus, then remove, etc. Lot of work so I'll probably avoid close ups.

Tom

[tom thomas]

Oops, I meant to say that the lenses were 4 1/8 inches from film plane, not 4/25 inch.

Ivan, thanks for the info. It's this lever on mine that appears to have slipped or has been maladjusted. A bit like me I guess. I at least know I'm slipping.

Fun? thing is that the E-Bay seller said; "The rangefinder is very contrasty and clear as well it is properly coupled and calibrated to the lens." No way. I should have taken this statement with a ton of, not a grain of salt. It is clear though so perhaps the mirrors are OK shape.

Tom

[Wayne Crider]

Ok, first off make sure that the Kalart is set for the lens focal length. (If it's the original lens you shouldn't have to do anything.) If it's not, check it. It's an internal adjustment if necessary to the settings in the chart in the instructions. You take off the cover screws at top and bottom. The guts are screwed in underneath and remain on the camera. All your taking off is the cover.
Secondly, and from what I have noticed in the past, if the set screw at the Kalart shaft is loose for the arm, it's a whole new ball game. That shaft is spring loaded and has to be turned before you tighten the arms setscrew. Check by pushing the arm back by finger. You should feel the tension. It is a pain in the butt to fix if necessary.

The following adjustment is done only if necessary. Skip if unnecessary.
To set the Kalart for the lens an internal adjustment is done to the front and back scales. The rear scale is set by loosening a brass screw first. You'll see it. The problem is the brass screw breaks at the slot and, well your screwed. Be very careful, do not force it. A drop of penetrating oil on a toothpick and left to set would be smart if it is tight.
The is also a third adjustment for registration which shows as a focus spot mis-aligning to the side. This is done to the top mirror.

So first you rack out the rail till the rangefinder shows focus at infinity. You then set the bellows showing focus on the GG. Wherever the rail is is right. Set the infinity stops. From there you measure to 25 ft and set focus on the GG by racking the bellows. If the rangefinder is out you have to adjust it by the instructions. Do not waste your time and try to adjust to 8ft. If your good from 25 ft for a long lens or 12-15 ft for a shorter one, out to infinity consider it done. Do not do any more adjustments then necessary. The adjusting cam on the rail should be set at a neutral position to begin, or just try it where it is. It may have never been moved. Read page 5 in the link I gave for adjusting infinity when out, by adjusting this cam. If you have to adjust the cam, you have to reset infinity adjustment. You adjust back and forth till your right.