Luminous Landscape Forum

Equipment & Techniques => Medium Format / Film / Digital Backs – and Large Sensor Photography => Topic started by: chiek on April 04, 2014, 01:32:33 am

Title: 90mm F1.0 lens for A7/A7R
Post by: chiek on April 04, 2014, 01:32:33 am
VARO 90mm F1.0 lens modified to Sony Alpha mounts.

large image circle, I think It can cover 22,39Mpx digital back. Not test yet.

more informations,
https://www.facebook.com/joongkeun.chie/posts/756281607729429 (https://www.facebook.com/joongkeun.chie/posts/756281607729429)
https://www.facebook.com/photo.php?fbid=751412364883020 (https://www.facebook.com/photo.php?fbid=751412364883020)

my Blog review.
designing camera (http://chiek.co.kr/list/view.php?id=camera&page=1&sn1=&divpage=1&sn=off&ss=on&sc=on&select_arrange=headnum&desc=asc&no=38)

camera image captured by CF-39MS back  :D
Title: Re: 90mm F1.0 lens for A7/A7R
Post by: LKaven on April 04, 2014, 09:43:26 am
Nice images!  The lens works very nicely here.

Is this the same lens made by Leitz Canada listed here?

http://www.ebay.com/itm/Ultra-Fast-90mm-f1-0-Lens-and-65mm-f0-75-Lens-Leica-Leitz-/281242006240?pt=Camera_Lenses&hash=item417b5472e0

Or is it like this?  Or are they the same thing?

http://www.ebay.com/itm/90mm-f-1-0-portrait-lens-for-Sony-E-mount-All-NEX-Alpha-A7-A7R-full-frame-/111289502955?pt=Camera_Lenses&hash=item19e95f0ceb

Can you get these?  Or have they come out of old stock for a discontinued item?  What was the original application for these...does the Xray marking on the lens barrel have something to do with it?

I also noticed there was a 65mm f/.75  

Wow.
Title: Re: 90mm F1.0 lens for A7/A7R
Post by: chiek on April 04, 2014, 10:15:23 am
Quote from: LKaven on April 04, 2014, 09:43:26 am
Nice images!  The lens works very nicely here.

Is this the same lens made by Leitz Canada listed here?

http://www.ebay.com/itm/Ultra-Fast-90mm-f1-0-Lens-and-65mm-f0-75-Lens-Leica-Leitz-/281242006240?pt=Camera_Lenses&hash=item417b5472e0

Or is it like this?  Or are they the same thing?

http://www.ebay.com/itm/90mm-f-1-0-portrait-lens-for-Sony-E-mount-All-NEX-Alpha-A7-A7R-full-frame-/111289502955?pt=Camera_Lenses&hash=item19e95f0ceb

Can you get these?  Or have they come out of old stock for a discontinued item?  What was the original application for these...does the Xray marking on the lens barrel have something to do with it?

I also noticed there was a 65mm f/.75  

Wow.
thanks for interest.
first, leica lenses are not enough image circle (25mm?) and very short flange back. so it can't fit mirrorless.
second listing from ebay is same but something is different, varo 90mm lens are 2 types. one is small rear lens diameter and the other is larger diamemter. mine has larger diameter.

larger diameter lens have more larger image circle than small rear lens.

small rear lens has approx 40mm image circle.
I guess ebay listing similar to mine is small rear lens.
mine has approx 55mm image circle at infinity.

very hard to find.
search de oude delft, made by holland. I guess it is similar to varo lens.
Title: Re: 90mm F1.0 lens for A7/A7R
Post by: EricWHiss on April 11, 2014, 11:34:38 am
Interesting! Are these projection lenses like the Rodenstock Heligons?
Title: Re: 90mm F1.0 lens for A7/A7R
Post by: Lacunapratum on April 11, 2014, 05:31:14 pm
Likely old X-ray lenses. 
Title: Re: 90mm F1.0 lens for A7/A7R
Post by: LKaven on April 11, 2014, 06:32:44 pm
Quote from: Lacunapratum on April 11, 2014, 05:31:14 pm
Likely old X-ray lenses. 

From the pictures, they do appear to be labeled as X-ray lenses.
Title: Re: 90mm F1.0 lens for A7/A7R
Post by: chiek on April 11, 2014, 10:52:55 pm
Quote from: EricWHiss on April 11, 2014, 11:34:38 am
Interesting! Are these projection lenses like the Rodenstock Heligons?

Yes, like heligon, kowa... x ray lens.
but heligon lens is very short flange back. many these types are same.
but varo lens is long flange back so It can modify.