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Promaster (Cosina) AF Macro 100mm F3.5 Review RSS Feed

Promaster (Cosina) AF Macro 100mm F3.5

Sharpness 
 9.3
Aberrations 
 8.0
Bokeh 
 8.0
Handling 
 7.7
Value 
 9.0
Reviews Views Date of last review
3 12,060 Mon September 4, 2023
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Recommended By Average Price Average User Rating
100% of reviewers $100.00 9.33
Promaster (Cosina) AF Macro 100mm F3.5

Promaster (Cosina) AF Macro 100mm F3.5
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Promaster (Cosina) AF Macro 100mm F3.5
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Promaster (Cosina) AF Macro 100mm F3.5
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Description:
Auto Focus 100mm F3.5 Macro , this is the later AF version of the Cosina 100mm f3.5.
With 1:1 Macro Adaptor

Lens Construction: 5 Elements / 4 Groups
Angle of View: 25 Degrees
Aperture: F3.5 to F22
Min Focus Distance: 1.4 Feet
Maximum Magnification: 1:2 (1:1 with adapter)
Lens coating: Multicoated
Length: 73mm
Diameter: 68mm
Weight: 7.3oz
Lens Hood: Screw in
Filter size: 49mm
Mount Type: Pentax KAF2/KAF (screwdrive AF)
Price History:



Add Review of Promaster (Cosina) AF Macro 100mm F3.5
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New Member

Registered: November, 2013
Posts: 14
Review Date: September 4, 2023 Recommended | Price: $50.00 | Rating: 10 

 
Pros: very sharp macro lens
Cons: extremely few CAs - nearly none
Sharpness: 10    Aberrations: 9    Bokeh: 8    Handling: 9    Value: 10    Camera Used: k-5 k-x k-s1 fuji x-e1 + x-T100   

Same oder very similar lenses under the brands PENTAX, VIVITAR, SOLIGOR, and COSINA


with 90 LP = 180 black and white lines / mm really professional values (with 24 MP Fuji)

+++ with f 8 - f 11 extremely sharp macro photos possible

++ nice bokeh

++ beautiful colors

++ scarecely CAs visible


very highly recommended - inspite its plastic housing
   
Veteran Member

Registered: November, 2013
Posts: 791

1 user found this helpful
Review Date: January 27, 2014 Recommended | Price: $125.00 | Rating: 10 

 
Pros: Lightweight. Plastic Fantastic. Beautiful Images. Affordable AF
Cons: Plastic. Noisy. Light build.
Sharpness: 9    Bokeh: 9    Handling: 7    Value: 10   

This lens is awesome. Yes, it feels cheap, is noisy, and the AF hunts sometimes. But it is affordable, the optics are great, and can deliver the images from light and fairly compact lens. 100mm is also useful for just general walk-around shooting where the AF works well. Yes it is F3.5 which means if you are outdoors with lots of light who cares and if not, then you are probably on a tripod and the max aperture is irrelevant anyway.

Note the real images appear sharper than they do presented here:
   
Veteran Member

Registered: February, 2013
Location: Melbourne
Posts: 2,551
Review Date: August 24, 2013 Recommended | Price: $125.00 | Rating: 8 

 
Pros: Sharp
Cons: Hunts , large focus range ( infinite to Macro ), noisy , very plastic , slow focus ,
Sharpness: 9    Aberrations: 7    Bokeh: 7    Handling: 7    Value: 7   

What can I say , the lens is very light weight , feels almost fragile . Its very noisy , has a long focus range ( infinite to macro ) and it takes a while to go from one extreme to the other .. Also the lens hunts a lot ( trying to focus ) , and small things can be a little hard to lock onto . The lens is sensitive to texture , how can I explain , something like a flower that has different shapes that are close together yet apart in focal distance can really challenge the lens as it hunts back and forth trying to lock the focus .. Now that can be a good thing as its looking for the best possible focus , or it can be bad , as you may not have time for such things .. Now this could simply be related to the camera itself and not necessarily the fault of the lens ( possibly the combination ) .

The lens does feel cheap , its very plastic , feels a little like a one of those REVEL model airplane kits you glue together ..

Now on the plus side , it does seem to take a decent picture for the price paid , I dont think I can complain about the results . When it works , it works well , lets look at some samples :
















I have rated the lens as an 8 overall , but I rate the results about a 8.5 to 9 ( actual images produced )

If this lens is all you can afford , then by all means go for it , I dont know how much abuse this lens can take so I suggest care . I was hoping for a better AF , faster AF and a better lock into focus .. But it is a cheap AF Macro lens and expecting it to perform with lenses costing 2 to 4 times more is probably asking a bit much .

The results are what count , and the lens takes a decent picture and is certainly a step up from the budget zoom lenses with Macro or close focus capability such as the Sigma 28-80 Macro or Pentax kit lenses from 10 or so years ago .

I only just got this lens , and Im not sure if Im keeping it , ill just wait till spring I think , and see how it goes after a thousand or so Macro pictures . Im not displeased with it , Im just spoiled for choice with quite a few Manual Focus Macro options ... So the only question is , can this lens find a niche for itself in my growing lens collection ?
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