280/4 Image Circle

[jankap]

Advertisement (gone after registration)

You have 6 mm too little "air" (47 instead of 53 mm). That is a lot. With 6 mm you would reach infinity.

It could be, that there is a possibility of some adjustment in the lens itself (adjusted by QA of Leica).

 

1. Does not there exist a enlarging adapter?

2. Try perhaps a negative lens in front of the lens. In the end you don´t want to achieve infinity.

Jan

 

PS

5000 mm (portrait distance) would be 1,3 mm.

So you must win 4 to 5 mm.

Give it a try with your optician.

Edited April 10, 2017 by jankap

[jip]

So I would have to have a screw in filter that acts like glasses with a '-2 strengt'? 

 

Because the problem is that the rear element protrudes into the Leica S and then hits the mirror. 

Edited April 10, 2017 by jip

[Advertisement]

The Leica Q3 is available for pre-order at B&H Photo Video and Adorama

[jankap]

Exactly. Dioptrie -2 is too strong, I think.

In the Miranda forum they (try to) solve the corner problem of rangefinder lenses on the Sony A7 in a similar way.

 

The mirror problem makes it worse. I don´t see a solution for this.

The protruding is with an LR to LS adapter?

 

For me Wil van Manen has cut (Dremel) a part of the protecting ring of my Summicron R. I use the lens with a Metabones booster (on APS).

Jan

 

Dutch syntax would allow the verb "to dremel".

[jip]

Just where would I be able to find a -1 diopter in E67 filter thread? 

[Locutus]

I dont think you could adjust the Summilux 80's infinity stop further back like you can on a super tele.

 

...Just look at the stopper ridge for the lens hood, you have 2 milimeters more travel before it would knock into the focus ring.

[jip]

Yes so instead of adjusting the lens we can add another piece of glass in front of it to achieve this focus... just like people who need glasses to see far away (like I do myself).

[jankap]

Advertisement (gone after registration)

The distance scale is no longer valid of course.

The same as with a close-up lens.

Jan

[eilert anders]

Will the 280mm f4 APO Telyt focus to infinity on the S with a 2X APO extender?

 

Will the 400mm f6.8 Telyt focus to infinity on the S, and does it provide a sufficient image circle?

[a.noctilux]

Will the 280mm f4 APO Telyt focus to infinity on the S with a 2X APO extender?

 

Will the 400mm f6.8 Telyt focus to infinity on the S, and does it provide a sufficient image circle?

 

1  - Apo-Telyt-R 4/280 + Extender (x1.4 or x2) focus is on the lens, so no infinity with the combo or maybe with the focussing that pass infinity, it may depend on temperature

 

2   - Telyt-V or R 6.8/ 400 or 560 has some corner vignetting with 24x36, the image circle is limited by the mount (the second "module" that change R to Viso)

     and with the large curve field, the use is very limited

Edited June 27, 2017 by a.noctilux