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Vivitar 100-300mm F5.6-6.7 MC MACRO

Reviews Views Date of last review
4 22,963 Sun November 2, 2014
Recommended By Average Price Average User Rating
25% of reviewers $36.00 4.50
Vivitar 100-300mm F5.6-6.7 MC MACRO

Also marketed as a Cosina (and probably sold under other marques as well) see here.

Note that the PK-A/R mount has the ricoh pin which can catch in the AF slot on pentax dslr.

Focal Length - 100mm - 300mm
Lens Max Aperture - f/5.6-f/6.7
Min Aperture - f/32
Focus Type - Manual Focus
Closest Focusing Distance - 58.8 in
Picture Angle -8.4 - 24.6 degrees
Groups / Elements - 10 Elements in 8 Groups
Length -5.3 in
Weight - 17.3 oz
Mount Type: Pentax KA
Price History:

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New Member

Registered: July, 2014
Location: Eau Claire
Posts: 14

1 user found this helpful
Lens Review Date: November 2, 2014 I can recommend this lens: Yes | Price: $10.00 | Rating: 6 

Pros: Inexpensive, Birding Lens
Cons: Terrible zoom creep, CA

I had just bought my first Pentax (body only) and has purchased one lens to go with the camera. The very next week I found someone on Craigslist was looking to sell their old pentax gear for $45.00. The gear included this lens and 3 others.

After the first week, I set this lens aside because I didn't like the results I was getting. With a little practice, I'm able to get some pretty good shots of birds out the back patio. For the price I paid for s lens with this type of magnification, I'm pretty happy.


Registered: April, 2011
Location: Lost in translation ...
Posts: 18,004

1 user found this helpful
Lens Review Date: November 5, 2012 I can recommend this lens: No | Price: None indicated | Rating: 4 

Pros: One touch, relatively small size ...
Cons: A lot ... zoom creep, etc. - see previous reviews - The Cosina version is slightly better ...
Sharpness: 4    Aberrations: 4    Bokeh: 4    Handling: 5    Value: 4   


I am not sure that I should even be reviewing this lens given the condition of the thrift store copy that I snapped up ... bought it mainly for parts, ie the rear mount assembly, in order to possibly convert another lens to a PK mount ... the front element coatings on this copy are in bad shape by either wearing off or just plain old age ...

I have a Cosina version of this lens which I gave a "6" and a negative recommendation ( see ). The Cosina version is more metal in its construction and thus feels and handles nicer IMHO. The test shots which this Vivitar version were not good at all, poor IQ, bland colors, etc.

Thus, even through my copy suffers from old age and maybe some abuse, I won't recommend this lens and give a "4" rating, which is harsh, yet true.

Allez et salut, John le Frog
Junior Member

Registered: May, 2010
Location: Bekasi
Posts: 32
Lens Review Date: April 5, 2011 I can recommend this lens: No | Price: $45.00 | Rating: 4 

Pros: usable
Cons: really low-res, feebly zoom scale, slow (ah well)

This Cosina built has many brand label as I recall.
Cosina, Tokina, Vivitar, Tamron, Phoenix etc. Also available in AF version, eh?
Same optics, I don't think one of them is any better.

It's too slow as long telephoto, impossible hand-held, dim finder.
Low-res, my shots with this lens enlarged to 5x7" look soft.

Seems designed as is
Please accept it's destiny...
Forum Member

Registered: July, 2010
Location: Lubbock, TX
Posts: 59
Lens Review Date: January 27, 2011 I can recommend this lens: No | Price: $53.00 | Rating: 4 

Pros: Lightweight (all that it has going for it)
Cons: Really bad zoom creep, you can feel the plastic in its construction, hard to focus, REALLY bad CA and purple fringe, soft focus, dodgy IQ

Vivitar lenses are hit or miss with the few hits being really good, according to what I've heard. But this one is a big miss in my opinion.

I bought this off of KEH right after I got my K-x just to try it out. It even handled and felt well on my K-x. After a bit of experimentation, I found that this lens only makes decent pictures at a distance of 10 - 12 feet (3.04 - 3.57 meters). The minimum focus distance is around 6 feet (1.82 meters).

The CA and purple fringe on this thing are horrendous (even egregious in a few cases), and plague a lot of the photos I've taken with it. The focus is really soft which makes for constantly fuzzy pictures. The zoom creep is really bad on this thing; among the other zoom lenses I own, this thing goes really fast on zoom creep. You can tell it's made of cheap plastic when you pick it up and hold it. It's hard to focus in a lot of instances and macro mode is hit or miss.

I've gotten a few good pictures with it, but overall, I wouldn't recommend this lens. Should you go ahead and buy it, beware that it has the Ricoh pin in it (PK-A/R mount), which requires removal before mounting on AF Pentax cameras, or else it will get stuck and leave you in a bad situation (fortunately I didn't have that happen to me, as I removed the pin).

Technical specifications were derived from the Canon mount version (which is the same thing, only with a Canon mount) from (I'm giving credit where it's due).
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