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SMC Pentax-M 100mm F4 Macro Review RSS Feed

SMC Pentax-M 100mm F4 Macro

Sharpness 
 9.6
Aberrations 
 8.8
Bokeh 
 8.5
Handling 
 9.3
Value 
 9.3
Reviews Views Date of last review
37 245,276 Tue January 17, 2023
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Recommended By Average Price Average User Rating
97% of reviewers $116.47 9.08
SMC Pentax-M 100mm F4 Macro

SMC Pentax-M 100mm F4 Macro
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SMC Pentax-M 100mm F4 Macro
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SMC Pentax-M 100mm F4 Macro
supersize

Description:
This macro lens was also released with a dental scale. It is capable of 1:2 magnification.



SMC Pentax-M 100mm F4 Macro
© www.pentaxforums.com, sharable with attribution
Image Format
Full-frame / 35mm film
Lens Mount
Pentax K
Aperture Ring
Yes (no A setting)
Diaphragm
Automatic, 6 blades
Optics
5 elements, 3 groups
Mount Variant
K
Check camera compatibility
Max. Aperture
F4
Min. Aperture
F32
Focusing
Manual
Min. Focus
45 cm
Max. Magnification
0.5x
Filter Size
49 mm
Internal Focus
No
Field of View (Diag. / Horiz.)

APS-C: 16 ° / 14 °
Full frame: 24 ° / 20 °
Hood
Not needed
Case
Dedicated hard case
Lens Cap
Plastic clip-on
Coating
SMC
Weather Sealing
No
Other Features
Diam x Length
64.6 x 77.5 mm
Weight
355 g
Production Years
1977 to 1984
Engraved Name
smc PENTAX-M MACRO 1:4 100mm
Product Code
28960
Reviews
User reviews
Notes
Lens hood PH-R49 fits, but isnt necessary du to the recessed front element
Variants

This lens was also released with a dental scale as the smc PENTAX-M DENTAL MACRO 1:4 100mm

Features:
Manual FocusAperture RingFull-Frame SupportDiscontinued
Price History:



Add Review of SMC Pentax-M 100mm F4 Macro
Author:
Sort Reviews by: Date | Author | Rating | Recommendation | Likes (Descending) Showing Reviews 31-37 of 37
Veteran Member

Registered: October, 2008
Location: Albuquerque NM
Posts: 9,830

1 user found this helpful
Review Date: May 12, 2009 Recommended | Price: $100.00 | Rating: 9 

 
Pros: Tack sharp, compact
Cons: No A setting, Could be faster

I bought this lens in the early 80s so my price would not be relevant, and it was one of my favorites for years. It is super sharp, and works great in macro as well.

Here is one from Tours, France 1988, MX, TMax 400:

   
Forum Member

Registered: January, 2009
Location: Seattle
Posts: 54

1 user found this helpful
Review Date: February 15, 2009 Recommended | Price: $100.00 | Rating: 8 

 
Pros: Very sharp, precise focus
Cons: Not really a macro lens, focuses past infinity.

Been using for about 1 month on a K200D

I'd give this a 9 if it didn't say "macro" on it. I don't find it to be very useful as a macro lens, especialy since I can get the same shot with my da 16-45.

But as a 100mm this thing is awesome. Focus ring is huge, has a great feel and is very precise. Images, so far, have been very pleasing and sharp. Gives a good feel to close subjects.
   
New Member

Registered: December, 2007
Location: Izmir / Turkey
Posts: 19
Review Date: January 22, 2009 Recommended | Price: $200.00 | Rating: 8 

 
Pros: Very Sharp, Nice Bokeh
Cons: 1:2 magnification

I bought it second hand from Ebay to 200 USD. It has got hard focusing ring but maybe it can be a problem of my copy. Generally I love it and use on both film and digital.
   
New Member

Registered: July, 2008
Location: Queensland Australia
Posts: 8

1 user found this helpful
Review Date: August 26, 2008 Recommended | Rating: 9 

 
Pros: cheap, good contrast, nice colours
Cons: manual everything, not 1:1

Saved it from the dumpster at work and I find it to be a great first macro lens and it is a nice portrait lens too.
   
Loyal Site Supporter

Registered: November, 2007
Location: Sparwood, BC, Canada
Posts: 12,385

1 user found this helpful
Review Date: November 9, 2007 Recommended | Price: $250.00 | Rating: 9 

 
Pros: Very, very sharp
Cons: 1:2 only without extension tube
Sharpness: 10    Aberrations: 6    Bokeh: 7    Handling: 7    Value: 8   

I use this lens for the next week on my MZ-S, where it snaps-in-focus beautifully. (My K10D arrives in a week) I purchased it used two years ago. It is smooth focusing and sharp as can be. Mine is the "dental" version.

[Edit] Update 2011 August. This lens is still superb for its age, even on my K10D. I would not hesitate to recommend it to anyone. I have recently tried the AFA 1.7X on the lens, and the combination is just as sharp as the lens alone.
   


1 user found this helpful
Review Date: May 10, 2007 Recommended | Rating: 8 

 
Pros: clear, sharp, well-built
Cons: only 1:2 macro, despite the name

I borrowed this lens from a fellow Pentax user a while ago, and was very surprised at how sharp and clear the images were, and how nice the focus ring felt to turn.
   
Inactive Account

Registered: September, 2006
Location: D/FW area, Tx.
Posts: 1,710
Review Date: January 8, 2007 Recommended | Rating: 9 

 
Pros: light weight, great contrast, very sharp lens, price nowadays
Cons: only 1:2 macro

i loved this lens for over 25 years but i wanted a true 1:1 macro. i sold it as the vivitar was as sharp.a great lens for the beginner macro photog.. highly recommended.. and usually around used for 100usd.
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