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Welcome to the Third-Party Pentax Lens Review Database!
This database contains reviews and technical data on third-party lenses (made by Sigma, Tamron, etc.) designed for use with Pentax K-Mount DSLRs and film SLRs. In addition to being able to post lens reviews, users can also add new lenses to this database.

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In-Depth Pentax Lens Reviews

Category Lenses Reviews
Sigma Lenses
  Current Zoom Lenses 
3 58
  Current Prime Lenses (1 viewing)
3 53
  Legacy Zoom Lenses (5 viewing)
108 1,154
  Legacy Prime Lenses (5 viewing)
64 434
Tamron Lenses
  Zoom Lenses (3 viewing)
27 547
  Prime Lenses (1 viewing)
20 126
Irix Lenses
  Prime Lenses 
6 33
Tamron Adaptall Lenses
  Zoom Lenses (1 viewing)
42 201
  Prime Lenses 
26 205
  Adaptall Adapters 
Adapters that enable the use of Tamron Adaptall lenses on Pentax cameras.
9 18
Samyang Lenses
  Prime Lenses (1 viewing)
16 193
Venus Laowa Lenses
  Prime Lenses 
7 12
Lensbaby Lenses
  Prime Lenses 
13 8
Samsung Lenses
  Prime Lenses 
2 3
  Zoom Lenses 
6 11
Tokina Lenses
  Prime Lenses 
22 145
  Zoom Lenses (5 viewing)
60 321
Schneider-Kreuznach Lenses
  Prime Lenses 
6 4
  Zoom Lenses 
4 10
Vivitar Lenses
  Zoom Lenses (1 viewing)
42 255
  Prime Lenses (6 viewing)
63 322
Cosina Lenses
  Zoom Lenses 
12 46
  Prime Lenses 
23 91
Ricoh Lenses
  Prime Lenses (1 viewing)
27 135
  Zoom Lenses 
14 31
Carl Zeiss Lenses
  Prime Lenses 
34 193
Quantaray Lenses
  Zoom Lenses (3 viewing)
11 49
Russian and Zenitar Lenses
  Prime Lenses (8 viewing)
52 357
Voigtlander Lenses
  Prime Lenses 
11 85
Miscellaneous Lenses
  Zoom Lenses (3 viewing)
123 217
  Prime Lenses (7 viewing)
352 957
  Teleconverters (All Brands) (2 viewing)
43 167

Recent Products
Yashica 28mm f2.8 Auto Yashinon DS-M review
Yashica 28mm f2.8 Auto Yashinon DS-M
EXACTA 28mm, F:2.8 MC MACRO review
EXACTA 28mm, F:2.8 MC MACRO
Pentacon 500mm f5.6 review
Pentacon 500mm f5.6
Venus Optics Laowa 15mm F4.5 Zero-D Shift review
Venus Optics Laowa 15mm F4.5 Zero-D Shift

Kuribayashi C.C. Petri Orikkor 50mm f2
HOYA HMC 135mm F2.8 PK review
HOYA HMC 135mm F2.8 PK
Prinzflex AUTO MC 135mm F2.8 PK review
Prinzflex AUTO MC 135mm F2.8 PK
Elicar 28mm f/2.8 Automatic review
Elicar 28mm f/2.8 Automatic

Steinheil MŁnchen 135mm F2.8 Auto-D-Tele-Quinar
Vivitar 75-200mm f4.5 Autofocus (Cosina?) review
Vivitar 75-200mm f4.5 Autofocus (Cosina?)

Most Popular Lenses
Helios 44-2 58mm F/2 review
Helios 44-2 58mm F/2
Tamron 70-200mm F2.8 Di LD Macro review
Tamron 70-200mm F2.8 Di LD Macro
Tamron 17-50mm F2.8 SP AF XR LD Aspherical IF Di II review
Tamron 17-50mm F2.8 SP AF XR LD Aspherical IF Di II
Tamron 28-75mm F2.8 AF XR Di LD Macro SP review
Tamron 28-75mm F2.8 AF XR Di LD Macro SP
Carl Zeiss Jena 50mm F2.8 Tessar review
Carl Zeiss Jena 50mm F2.8 Tessar
Vivitar (komine) Auto Telephoto 135mm F2.8 review
Vivitar (komine) Auto Telephoto 135mm F2.8
Tamron SP AF 90mm F2.8 Di Macro review
Tamron SP AF 90mm F2.8 Di Macro
Sigma 24mm F2.8 Super Wide II review
Sigma 24mm F2.8 Super Wide II
Tamron 70-300mm F4-5.6 AF Di LD Macro review
Tamron 70-300mm F4-5.6 AF Di LD Macro
Sigma 10-20mm F4-5.6 EX DC J review
Sigma 10-20mm F4-5.6 EX DC J

Random Lenses
Soligor t-mount pre-set 450mm f8 review
Soligor t-mount pre-set 450mm f8
Sigma APO 135-400mm F4.5-5.6 review
Sigma APO 135-400mm F4.5-5.6
Sigma - Z 28mm f=2.8 Multi-Coated review
Sigma - Z 28mm f=2.8 Multi-Coated
Jena (Carl Zeiss) Cardinar 100mm f/4 (in Werra Rangefinder mount) review
Jena (Carl Zeiss) Cardinar 100mm f/4 (in Werra Rangefinder mount)
Accura Diamatic 35mm f/2.8 review
Accura Diamatic 35mm f/2.8

Statistics
Pentax Lenses: 1,251 | Total Reviews: 6,441 | Views: 36,762,117
Users browsing the lens reviews: blankmampf, Nenad M. and 57 unregistered users
 
Recent Reviews
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Tamron 17-50mm F2.8 SP AF XR LD Aspherical IF Di II Review
SHOT6248.JPG
Set this lens to f/4 or higher and itís very sharp corner to corner throughout the focal range. Set to f2.8 itís not much different just slightly lower sharpness in the corners but the corners are still good; again throughout the focal range. Something almost all Standard zooms struggle with, but no...
Rating: 9 | Recommended: Yes Read More
Sigma 105mm F2.8 EX and EX DG Macros Review
1_Sigma_105.jpg
PROS : cheap, sharp and luminous. A great job for macro. CONS : NOISYYYYY and SLOWWWWW AF, I tend to shoot manual focus though...
Rating: 7 | Recommended: Yes Read More
Irix 15mm F2.4 Blackstone Review
irix-15mm-f24-blackstone.jpg
Had a problem with a used copy and had experience with Irix Customer Service regarding that lens (damage caused by the U.S. Postal Service which welched on the insurance payoff), and Irix was outstanding. I'm not saying that merely in contrast to Ricoh's nonexistent customer service, but with respe...
Rating: 10 | Recommended: Yes Read More
Pallas 28mm f/2.8 Magenta AM M42 Review
Pallas_three_quarter_from_rear_1000x800.jpg
I bought this lens on ebay for a joke and a low price. My copy looks beyond praise. Genuine leather cover !!! and a limited edition cap. It is heavy and durable. But the picture is somewhat boring. Most likely he loves bright light. On K1 it goes almost to infinity. But this is rather the trouble of...
Rating: 6 | Recommended: No Read More
Irix 150mm F2.8 Macro 1:1 Review
Irix_150mm_F28_Macro_3-768x432.jpg
One of the best and most satisfying lenses I have used by far. IQ is is Excellent.
Rating: 10 | Recommended: Yes Read More
Tamron Adaptall-2 28-70mm f/3.5-4.5 (59A and 159A) Review
28-70_pacerr_59A.jpg
59A version. Nice little walk around lens very suited to a light M series camera. I much prefer the two controls to a twist and slide zoom ring. Does feel somewhat plasticky, but has perfectly acceptable optics. My substitute for the optically excellent but bulky and slow autofocus 35-70 that the ME...
Rating: 8 | Recommended: Yes Read More
Tokina AF 19-35mm f/3.5-4.5 (193) Review
af193.jpg
Bought this lens used but in mint condition from Ebay. It came with lenshood, original caps and blue pouch. As soon as I tested the lens, I immediately replaced the 18-55mm kit lens. Sharpness is really night and day by comparison although you miss the weather sealing. I am willing to take its weigh...
Rating: 8 | Recommended: Yes Read More
Cosina Cosinon-S 50mm F1.8 Review
IMGP4526b.jpg
Looks like a pretty good lens, especially for that time. I bought it second hand around 7y ago when i bought my first Pentax, a KX with 18-55, and cannot afford an AF prime lens at that time... i used rarely for a couple of portraits and deposit on a box... today i found it and i said to myself... '...
Rating: 10 | Recommended: Yes Read More
Revuenon Special / Mamiya-Sekor ( pantor ) 35 f2.8 Review
IMGP7872.jpg
I think this lens is underrated. The quality is great, sharpness is good,colous are great. Aberation is not bad.I will give an 8
Rating: 6 | Recommended: Yes Read More
Tamron (adaptamatic/fixed mount) 300mm f5.6 Review
adapt300_ct300.jpg
This lens is absolutely underated it is at f/8 sharpness is comparable my canon RF 70-200 f/4L. It definitely has its weight to it but it is manageable and if you do wildlife on a budget get this lens you wont regret it.
Rating: 10 | Recommended: Yes Read More



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