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Cv15 ?


jackal

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ok didnt want to confuse teh other thread so started this new one

 

 

got one of these lenses coming in the post

im a bit confused about all this talk aboutr adaptors and coding and WATE menu ??

 

 

i am just going to fit the 15mm on the body using my adapter mount that came with my Ultron

 

fit the included CV viewfinder (but imagine thatthe view is a bit smaller cos its not 15 but obviously ~19mm), and then start shooting happy

 

is there something ive missed ? What is this WATE menu ?

 

sorry for appearing dumb

J

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im a bit confused about all this talk aboutr adaptors and coding and WATE menu ??

 

 

i am just going to fit the 15mm on the body using my adapter mount that came with my Ultron

 

fit the included CV viewfinder (but imagine thatthe view is a bit smaller cos its not 15 but obviously ~19mm), and then start shooting happy

 

is there something ive missed ? What is this WATE menu ?

 

Your adapter, if it is a CV, won't work for coding because its rim is cut away. There are older Leica adapters or new custom made adapters from John Milich that allow coding. John Milich's adapters have little holes milled in them and you just paint them in. The codes are here:

 

Leica M8 Lens Codes

 

Some people have luck using black and white nail polish. I had trouble with that and finally got mine coded with flat black model paint, no white. When you are successful, the M8 automatically brings up the WATE focal lengths, 16-18-21. You select 16. This happens when lens detecction is ON IR/UV.

 

You should use the 21mm view finder for best results.

 

On the other hand, you don't have to do any of this and just wing it.

 

Helene

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yes thanks

i will get a CV21 viewfinder at some point

 

 

what is the WATE menu ?

and what are these special machined adapters that you can buy ? John Milchgin is it ?

 

The WATE is the Leica Wide Angle Tri Elmar lens, with focal lengths of 16, 18 and 21mm in one piece of glass. If you choose to put an IR filter on it, then it will cure your problems relating to magenta etc but it creates another problem called cyan drift, which makes the corners of your images go cyan.

 

In order to cure THAT problem, the M8 can do some math and apply the result to your image before it outputs a corrected DNG or JPEG file. But to do that math, it needs to know the focal length of the lens.

 

The M8 'knows' the focal length of lenses from a combination of two pieces of information. One is the 6 bit code on the lens mount. The other is the shape of the flange on the mount, in terms of which set of frame lines it brings up when mounted.

 

But the WATE has THREE focal lengths so the user must tell the camera which is in use if (s)he wants the corrections to be made.

 

So if in Menu>Lens Detection you have selected On + UV/IR in order to instruct the camera to do all this stuff, the camera, when a WATE is mounted, will ask you to tell it which of the WATE's focal lengths is selected.

 

SO:...in order to use any non-Leica lenses with the M8 you either have to live with the IR problems or use a filter. If you use a filter on a lens of 35MM or less, you will create cyan drift, to varying degrees of severity.

 

To use a filter without cyan drift (and also to benefit from the M8's built-in vignetting corrections) you need your non-leica lens to be hand coded AND to bring up the correct framelines.

 

John Milich (do a search of this forum or read http://www.reidreviews.com) makes and sells adaptors for screw fit lenses which are easy to hand code. He makes them in three different fittings so as to trigger the correct framelines, too.

 

You can contact him at:

 

jm@milich.com

 

Good luck!

 

Tim

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ok thanks a lot

 

'wing it' sounds good :)

 

 

presumably the only prob will be peoples purple clothes

 

i noticed that i get this a lot outdoors in daylight

 

if i then use a IR filter will i get cyan ?

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presumably the only prob will be peoples purple clothes

 

i noticed that i get this a lot outdoors in daylight

 

if i then use a IR filter will i get cyan ?

 

The IR filters work fine. No cyan. Do you know you get 2 free IR filters from Leica when you sign up from them?

 

Helene

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Richard, I've never taken the finder out of the box. Heck, for that matter you don't even need to use the viewfinder on the camera. Set the lens on infinity and just point and shoot. Of course, your compositions will suffer:D But I've found that by walking up to a wide angle subject with the camera hanging from its strap, I get the shot. Only for extreme closeups do you need to adjust the distance to anything other than infinity. Good luck.

John

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