Alpa and 3rd party lens adaptation

[Paul Spinnler]

One thing I recently started to look into is adapting 35mm lenses like M glass onto the Alpa.

Surprised to see the huge IC of some M lenses on the IQ4:



That's shot with the Noctilux 75, so the foreground blur is just a table.

I'd say not bad! Anyone else adapting 35mm glass on IQ4?

That give you a clean 100-120 MPX file, cropped!

 

[akaru]

Never tried on 645 but did a lot on crop mf. IIRC the summicron 50 and 90 were a good match.

A 907x in “6x6” crop mode with M glass is a super compact and joyful camera to use (if you don’t need a shutter).

I have had the itch to pair a Nocti with an Achro!

 

[Paul Spinnler]

Yes, I think the M glass and SL glass are overspecc'd in a way where you have at least 40x40 of good useable sensor area - like in my sample above, it means vertically you have still good content in the middle.

In practice means with the Alpa M adapter you can get up to 100-120 MPX files which is quite cool! Especially with fast lenses where the outer edges are blurred this does not matter so much if the extremes are a bit less sharp.

Essentially a dream for Noctiluxes and Summiluxes.

 

[JeRuFo]

There are M-lenses that fully cover 645. The 90 summicron, for example. I don't know/think that the later versions will do that, but the pre-ASPH definitely do and look beautiful. Relatively big though.

 

[Paul Spinnler]

There are M-lenses that fully cover 645. The 90 summicron, for example. I don't know/think that the later versions will do that, but the pre-ASPH definitely do and look beautiful. Relatively big though.

That's cool! Didn't know that! - I suspect also quite a few R lenses, and especially the Summilux R on the longer side, especially the legendary R80 1.4 and 100 Macro APO.

There's an R adapter for the FPS which allows you to do walkaround photography ...

The 100 Apo Macro is apparently still class-leading to this day ...

 

[Paul Spinnler]

Another test with the M adapter, handheld, on the IQ4A; fast readout mode. 100 MPX goodness with the APO 35 M.



Resolution is fantastic.

The Alpa TC with the M adapter is the Leica M monochrom on steroids and the 35 APO is a fantastic wide-angle!

 

[cuida1991]

View attachment 217761

Another test with the M adapter, handheld, on the IQ4A; fast readout mode. 100 MPX goodness with the APO 35 M.

View attachment 217762

Resolution is fantastic.

The Alpa TC with the M adapter is the Leica M monochrom on steroids and the 35 APO is a fantastic wide-angle!

Is the APO 35 M "APO-Summicron-M 35 f/2 ASPH"?

 

[Paul Spinnler]

Is the APO 35 M "APO-Summicron-M 35 f/2 ASPH"?

Yes - all of the M lenses I have have more less the same large IC. Especially the Summiluxes, wide open, are easily useable on the Alpa TC with the M adapter as you can crop the image to roundabout 100 megapixels.

The 35/50 APO are extremely sharp wide open and render beautifully even on a large sensor area.

 

[cuida1991]

Yes - all of the M lenses I have have more less the same large IC. Especially the Summiluxes, wide open, are easily useable on the Alpa TC with the M adapter as you can crop the image to roundabout 100 megapixels.

The 35/50 APO are extremely sharp wide open and render beautifully even on a large sensor area.

So the image circle of 35 apo won’t cover the complete cmos of 4150?

 

[Paul Spinnler]

No it looks like the IC of the Noctilux in the first post.

It will cover crop MF essentially.

 

[cuida1991]

No it looks like the IC of the Noctilux in the first post.

It will cover crop MF essentially.

Thank you Paul. It seems it’s a perfect lens for 907x 100c.