Forgot Password
Pentax Camera Forums Home

Third-Party Pentax Lenses - Reviews and Database » Sigma Lenses » Legacy Prime Lenses
Sigma PANTEL 135mm F2.8 Review RSS Feed

Sigma PANTEL 135mm F2.8

Reviews Views Date of last review
4 30,761 Mon January 14, 2019
Recommended By Average Price Average User Rating
100% of reviewers $76.33 9.00
Sigma PANTEL 135mm F2.8

Have searched but so far have found little about this unique lens.

An earlier version is shown on the left. My version (mid 1970s) is on the right.

It is clearly marked "PAN-FOCUS" on the overly large focussing ring and displays an f-stop, in red, BELOW f/22, marked "Pan 64."

On the front is "LENS MADE IN JAPAN."

It's a fully manual lens with an all-metal mount marked "For Pentax K." My copy came with this adapter installed but it seems similar to those found on Tamron Adaptall units.

I've used it briefly on my K200D with results that are certainly acceptable. "Tack Sharp" it is not but neither could it be called soft. Very useful for portraiture with a pleasing OOF bokeh.

Will do more research and report again when I find more information.
Mount Type:
Price History:

Add Review of Sigma PANTEL 135mm F2.8
Sort Reviews by: Date | Author | Rating | Recommendation | Likes (Descending) Showing Reviews 1-4 of 4
Site Supporter

Registered: January, 2019
Location: Beautiful British Columbia
Posts: 53
Lens Review Date: January 14, 2019 I can recommend this lens: Yes | Price: $70.00 | Rating: 9 

Pros: Tack sharp when stopped down, good color
Cons: heavy.
Sharpness: 9    Aberrations: 8    Bokeh: 9    Handling: 9    Value: 10    Camera Used: Pentax K-S2    New Or Used: Used   

I purchased this lens from an Ebay seller based on the reviews from this site and overall the reviews are accurate. My initial test with the lens was a bit disappointing but the reviews here kept nagging at me so I pulled it out again to give it a try. The OP is correct when they stated that at the more open apertures the sharpness is lacking on the plane of focus, but as you start stopping down the sharpness really begins to snap. Here is a close cropped image of a clock at different f-stops:





As you can see once you get to F/8 the image really start to sharpen. Once you know this about the lens, it becomes a real contender for a slot in one's lens bag. Here are a couple of non cropped processed examples:

Once you hit F8 or smaller the detail and color this lens renders for it's price is hard to beat.

I have yet to try the f64 on this lens.

Thanks for reading!
Man With A Camera

Registered: June, 2010
Location: The Great Pacific Northwet
Posts: 22,796

1 user found this helpful
Lens Review Date: December 25, 2016 I can recommend this lens: Yes | Price: $59.00 | Rating: 10 

Pros: Sharp. Great color. Bokeh. All metal construction. Solid. Well built. Smooth focus.
Cons: Heavy (that darned all metal construction you know).

Snagged this on eBay for cheap thinking it would be good to have when I step up to a K-1. I figured that for the price I didn't have much to lose. So far this lens is impressing me. Sharp, great rendering and colors, bokeh.

Haven't tried it out at f64 yet, but look forward to a sunny day to give that feature a go.

I like the feel of this lens. All metal construction (save for the focus and aperture grips), precise fit of the moving parts, the heft of it. Feels solid.

The copy came in the original case, with the original metal slip on front lens cap and the original rear cap. It looks like it has never been used. No dust. No fingerprints. Now scratches or wear. It had a Vivitar Skylight filter on it, and there was a Tiffen polarizer (Made In USA!) in the case with the lens (bonus!).

A couple of photos I made today. Both were cropped about 60%, then shadows and highlights adjusted in post.

Sentinel by Racer, on Flickr

Sentinel by Racer, on Flickr
Loyal Site Supporter

Registered: July, 2010
Location: Ohio
Posts: 1,803
Lens Review Date: October 11, 2015 I can recommend this lens: Yes | Price: None indicated | Rating: 10 

Pros: Sharp, color, unique, build quality, inexpensive
Cons: f64 is well, let's just leave it there
Sharpness: 10    Aberrations: 9    Bokeh: 9    Handling: 10    Value: 10    Camera Used: KX film, PZ-1P, K-30    New Or Used: New   

I've never understood why one would post a review of a defective lens, as the previous reviewer. It does not provide a true description of what a good copy is capable of delivering. I bought this lens new and it has produced excellent images. Perhaps my copy is an exception, perhaps it's not. It's just a fact that my copy is in perfect working order. I'll let others be the judge based on the following photos, taken with my K-30 with minimal pp on Dx0
Senior Member

Registered: January, 2014
Location: Melbourne
Posts: 111
Lens Review Date: January 21, 2014 I can recommend this lens: Yes | Price: $100.00 | Rating: 7 

Pros: Cheap now
Cons: Poor wide open
Sharpness: 7    Aberrations: 6    Handling: 5    Value: 8    Camera Used: K-3   

I bought the earlier version of this lens in the '80s for $100 (can be bought much cheaper now), mostly to try star photos . Didn't use it much and later found it had a slow/sticking aperture but needed to be stopped down to at least f5.6 to get an image that was not washed out. It was used once on my K-3 before I got new lenses and got some images I liked when stopped down to f8. However my new SMC Pentax-DA 18-135mm ED AL DC WR is much better at 135mm. I also found that the Sigma was effectively about 180mm by comparison the Pentax lens.
EDIT 28 April 2014:
I think my initial results unfairly maligned this lens. I found out it was easy to jam the mechanism to keep the lens stopped down to whatever was set. Also the screws on the bayonet fitting were loose and tightening those improved its reliability and its now quite solid. I now think the lens is better for long range that the 18-135. Its much sharper across the field at f5.6 up. Deserves more testing, I might update this again.
Add Review of Sigma PANTEL 135mm F2.8

All times are GMT -7. The time now is 01:18 PM. | See also:, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]