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EPSON RD1 FOCUS PROBLEM


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Dear Leica friends,

I helped,yesterday evening, a friend of mine, a professional

photographers, to calibrate the rangefinder of his new epson rd1. He

has a 50 summilux pre asph and at 1 meter he had big error. We tried

for more than 1 our but the rangefinder was always changing. Has

anyone had similar results with luxes? I mean how small error is

acceptable? 3-4 cm is good ?

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Alessandro,

Something is not right with your friend's RD 1. In my experience the 50

Summilux should focus just fine, although there can be trouble with the 90

Summicron APO and the 135 Elmar due to mechanical misalignement

between these two lenses and the focus wheel in the camera body. I suggest

your friend take the camera back and exchange it. Does it focus the 50 Lux

correctly at infinity?

 

Howard (in Hong Kong)

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Agree. No problems with focussing in the close range (1-3m)

with 35mm and 50mm lenses (nor with my 90/F4 macro). With

care, I can even acceptably focus the 50 Noctilux wide open

within the same focussing range. I haven't done any testing

outside the medium to close range but the problems your friend

has are clearly in the close range. It sounds like a miscalibrated

rangefinder but I would pay close attention to whether you and

your friend are orientating your eye centrally to the rangefinder

view (not central to the framelines but central to the rangefinder

patch - at close ranges there is a significant amount of

difference in this regard).

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<i>No one seems to know why, but I've heard that most cameras

have this issue</i><br><br>Hmm.. Interesting how so many

products get trashed on these boards on so little evidence. If the

above is true then I must have been very lucky to get an example

that focusses absolutely fine.

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Interesting how easily rumor and innuendo get repeated as fact. The fact is: the main retail distributor in New York (B&H) is selling the R-D1 as of last night. I bought one from 'em, which should arrive next Monday. If there are any focusing issues with my sample I'll most certainly report them here, and if there are none I'll definitely report that too.

 

IMO Ian makes a good point. The Bessa/R-D1 finder requires you to center your eye in the RF patch. Otherwise there's no clear point when the RF & VF images snap into focus. I had some focus problems with the first roll of film I shot with a Bessa R back in 2000 due to this. Once I figured out the proper technique, no more problems.

 

-Dave-

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Grant, there are people who pay 3K for a handbag. I don't really

see your point. It isn't as if there are many other choices if you

want a digital rangefinder compatible with existing M lenses. The

D70 and 20D will provide the same (or better) quality at half the

price or much less but they don't take M lenses. It's either worth

3K to you or not.

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The camera was misaligned from the beginning, maybe due to the long journey to Italy, so we were forced to calibrate the three screws of the rangefinder, and this ought to be easier with digital picture. This morning it seemed ok but then in the afternoon it was wrong again. The infinite was ok but when we touched the screws everything had to be fixed again. We'll try harder and we'll follow your advice regarding the eye centering. Thankyou very much to all of you.

Alessandro.

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Last week I purchased 2 RD-1's in the UK. Both seem to have focus problems with the Leica 21 f2.8 asph and 35 f2 asph I bought with them. These are especially obvious in the close range with both lenses front focussing by a couple of inches.

 

I have bought a Hexanon 35 f2 for a Hexar RF, strangely this appears to focus correctly at close range! producing some of the sharpest images I have seen. It does seem to be a little off at infinity focus though.

 

Anyone have any thoughts?

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I have tried a 50mm f2 summicron-r and it seems to focus much better, it is only slighty front focussing. The attached picture has had a slight sharpen and is crpooed at 100% magnification (actual pixels).

 

On the 21 it is not the rangefinder that is out, manually set to infinity the lens still front focusses. I think the issue is to do with the wide or fast aperture leica designs and their compatability with the rd-1.

 

I really can't explain what is going on here.

 

Any more thoughts?<div>00A6aR-20441884.jpg.7f6515526fffe8a18aab2d0ca6f4ae6c.jpg</div>

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If the sensor was mislaligned wouldn't everything be out of

focus? In the 21mm shot there clearly is a plane of focus forward

of the stated focus point which, to me, suggests a rangefinder

issue. Epson may need to get a grip on this issue because, in

the internet forums at least, the reputation of this new camera is

fast going down the toilet. All I can state is my own experience

which is that the RD-1 example I own does not seem to have any

focus issues with the lenses I use - 24 Elmarit, 35 and 50 crons,

50 Noct (which surprises me given the short baselength of the

rangefinder) and 90/F4 macro (only tested in the very close

range). I'm fairly picky about focus so it's not that some of us

have different standards about what is acceptable and what isn't.

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A suggestion for anyone with focus problems on their RD-1.

Using a tripod I suggest focussing a given lens using your

existing (and proven to be ok) M camera body. Mark where the

lend has focussed (with a pencil or bit of tape). Put the RD-1 on

the tripod. Defocus the lens (put it on infinity) and then refocus

on the same object using the RD-1 rangefinder. Unless I'm

being a bit thick, the lens should be focussed to the same point

as it was on the M body. This experiment may not be as reliable

in the very close ranges due to differences in the shape/size of

the respective camera bodies becoming a factor.

 

You might also want to try the 'mirror' test (details in a number of

threads in this forum).

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