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Tamron Adaptall 80-250mm F3.8-4.5 (QZ-825M/QZ-250M) Review RSS Feed

Tamron Adaptall 80-250mm F3.8-4.5 (QZ-825M/QZ-250M)

Reviews Views Date of last review
2 9,447 Sat June 27, 2015
Recommended By Average Price Average User Rating
100% of reviewers $15.00 8.50
Tamron Adaptall 80-250mm F3.8-4.5 (QZ-825M/QZ-250M)

Tamron Adaptall 80-250mm F3.8-4.5 (QZ-825M/QZ-250M)
Tamron Adaptall 80-250mm F3.8-4.5 (QZ-825M/QZ-250M)
Tamron Adaptall 80-250mm F3.8-4.5 (QZ-825M/QZ-250M)

This Adaptall-1 two ring 80-250mm f3.8-4.5 TP was the last version before the introduction of the Adaptall-2 range. Like the 85-210mm adaptall-1's, which look very similar just a bit smaller, there are two versions: the earlier CZ825, and this one with the addition of a macro mode button. This mode extends the rotation of the zoom ring beyond the 80mm mark which moves one of the internal groups and reaches 1:2.5 magnification. This lens is referred to as QZ250-M on but as you can see in the pic the original case is stamped QZ-825M (which is in tune with the designation of the non-macro version).
Like all the adaptall-1's it has an M42 style A-M (auto-manual) aperture switch. When using this lens with PK-M mount in manual (green button) mode, or PK-A mount in aperture priority (Av) mode, make sure this is set to "A". To use Av mode with PK-M mount, set to "M" (ie flick to "M" to stop down at the moment of taking the picture).
It does not, however, have a tripod mount.

Focal Length (mm): 80-250mm
Aperture Maximum: f3.8 - 4.5
Aperture Range: f3.8 - 32, AE
Iris: 6 blades
Optical construction: 10 groups / 13 elements
Minimum focus distance: 59" /1.5m
Closest working distance: < 15cm
Magnification Ratio: 1:2.5
Filter size: 62mm
length (at infinity): 7" / 18cm
weight: 880g / 31 oz.
Lens Hood: Built-in, retractable
Mount Type: Third-party (adapter required)
Price History:

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New Member

Registered: February, 2015
Posts: 7
Lens Review Date: June 27, 2015 I can recommend this lens: Yes | Price: $15.00 | Rating: 9 

Pros: Sharp, relatively fast at the long end
Sharpness: 9    Aberrations: 7    Bokeh: 8    Handling: 8    Value: 10    Camera Used: K-5, A7, GF1   

Despite owning this for over a year, I have only just got around to testing it. I wish I'd done so sooner. This is a great lens for lunar photography! It's sharp, fast and easy to manage. Infinity is where it should be, and there is none of the lens creep you get with push/pull designs. Overall, a very nice surprise.

New Member

Registered: February, 2012
Posts: 15
Lens Review Date: May 25, 2013 I can recommend this lens: Yes | Price: $15.00 | Rating: 8 

Pros: Very sharp wide open at the long end. Reassuring bulk.
Cons: Bokeh a bit busy in challenging conditions.
Sharpness: 9    Aberrations: 8    Bokeh: 7    Handling: 9    Value: 10   

My copy of this lens is pristine, other than for a couple of scratches to the enamel of the built in hood. It looks much smarter than the one photographed above.

Apart from the barrel being 62mm rather than 58mm, and the fact that there is a macro button rather than Continuous Focusing in to macro, it handles very like the two touch 52A 70-210mm f3.5-4; it has the same quarter turn from 5 foot to infinity. The focus is nicely damped.

I'm really impressed with it at the long end. It stays faster to longer than the 104A 75-250 f3.8-4.5, and shows less fringing in high contrast scenes (but still more than I would like). The detail captured is as good as anything else I have at this focal length. It works well with the Pentax 1.7x AF converter.

Colours are a bit subdued. Bokeh is fussy if there are out of focus highlights in the background beyond the plane of focus, otherwise it is fine. It makes a better job of things in the foreground
Add Review of Tamron Adaptall 80-250mm F3.8-4.5 (QZ-825M/QZ-250M)

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