Asanuma 135mm f/2.8 Auto-Tele

Asanuma 135mm 2.8 Auto-Tele -1

Asanuma 135mm f/2.8 Auto-Tele. If you’re looking to purchase this lens I always check Adorama and Ebay for good deals. It helps me if you purchase it through one of these links here in this review. When you purchase through these links it financially enables me to devote time to develop this site further. Thanks for the help! -Todd

Asanuma 135mm 2.8 Auto-Tele -2


13.3 oz (377g)

Focus Type
Manual Focus.

Focus Ring
Rubber on Metal.

Close Focus
6 feet (1.8 meters).

Filter Threads
55mm, Metal.

Aperture Ring

6 blades stopping down to f/22.

My copy came in M42 Metal Mount.

Made in

Asanuma 135mm f-2.8 Auto-Tele - 2.8 Bokeh Blur-1-1


Asanuma 135mm f-2.8 Auto-Tele Chromatic Aberration-1

f/2.8 100% Crop


100% Crop

f/2.8 | f/3.5 | f/4 | f/8


Asanuma 135mm f-2.8 Auto-Tele Corner Sharpness-1-1


f/2.8: This lens is pretty soft with some coma and lots of chromatic and spherical aberration causing low contrast.
f/3.5: Sharpens up a tiny bit with a little more contrast but still a fair bit of chromatic and spherical aberration.
f/4: It’s sharper with a lot more contrast but still has a bit of chromatic and spherical aberration making the lens look softer then it is.
f/8: It’s decently sharp all over and most of the spherical aberration is gone. The contrast is still not radiant and you can still see a bit of chromatic aberration.

A fair bit of vignette at f/2.8 which quickly leaves by f/3.5 and almost all gone at f/4.

The blur is actually not too bad and probably one of the better features of the optics but not great.

It has a little more then usual pincushion distortion for a 135mm but not too bad.

On AF Camera
Optics:          ★ ★
Mechanics:   ★ ★ ★ ★
Ergonomics:  ★ ★ ★
Usefulness:   ★ ★
Availability:    ★
Overall:          ★ ★

On MF Camera
Ergonomics:   ★ ★ ★ ★
Overall:           ★ ★ ★
Out of 5

I would not go out of my way looking for this lens but if you can find one for a good price it can’t hurt. It’s a really well built lens, very easy to use, and the optics aren’t terrible but just not too exciting. My copy was a M42 mount, so it could be used on multiple digital bodies with adapters which are really cheap.


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My hopes are to take the time to continue developing this website with more test photo based reviews. If you are ever interested in purchasing this lens or other photography equipment please do so through these links here in this review. I always check Adorama and Ebay for good deals. This helps support my family and allows me to take more time for the site. The best part is this site is free for you and I link good deals I find!

Sometimes these links will actually give you better deals then typical retail prices! I personally buy from the links I have listed whether looking for new gear or fun old stuff. I can personally attest to their good & safe service from years of experience. Thanks again to you, our readers, for supporting us! -Todd