Specsavers own the brand name Pentax for use with spectacles. It used to be part of the camera company.

See this thread....
https://www.pentaxuser.com/forum/topic/pentax--lenses-34667

Update 2015 Seiko might have brought back the brand in other countries.
http://www.seiko-optical.com/index.php?id=187&L=21

If you think Pentax marketing is bad...... Seiko want you to fill in all your details before they will even give you the name of local SEIKO partners
http://www.seiko-eyewear.com/our-stores/select-country/

HOYA took over 50% of Seiko Optical in March 2014
http://www.hoya.co.jp/english/company/history.html

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How many Leicas did you see
Have you ever seen a Leica shop

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Quite a lot of 28mm lenses suffer from field curvature and also poor centering. They are very often sharp at the edge close to the camera. Minolta made one with variable field curvature.

I don't suppose it matters as long as you don't pixel peep When you reduce down to say 1250 wide you can get away with quite poor equipment

Can you see anything odd about this 24mm test shot? It's not the leaning lamp.




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I've got that lens as well Not quite as good as the 28-80mm but the edges hold up quite well for FF especially at f/8 - f/11. The poorest end is the 70mm end. I also have the A 35-70mm f/4 which is slightly sharper especially at the edges. It's also a very nice lens to use.

I'm just looking at a set of Practical Photography Tests on F lenses from 1990. The 28-80mm cost £200 and the 35-70mm £155.

The 28mm f/2.8 has poor edges..... but everyone knows that

It's a pity Pentax haven't re-badged the Tokina ....... Looks awesome ... Low distortion and good for 20x24 prints....

http://www.popphoto.com/lens-test-tokina-at-x-24-70mm-f-28-pro-fx

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Just been doing some K-5 comparison INF distance tests of the
Pentax-F SMC 28-80mm f3.5 - f4.5 against the
Pentax-A 50mm f1.4 at 50mm f/5.6 - f/8 which is a known top performer on Sony FF

Hardly any noticeable difference

Usable at f/4 which is wide open at 50mm

AF is a bit torquey and fast, but accurate and OK. Nice macro at 80mm.

Always been one of my favourite lenses along with the F 24-50mm

There's hardly any difference between 24mm and 28mm..... just step back slightly.

Note: This was the expensive SMC version not the cheap Kit-Lens that was produced in another factory. There was also a cheap Takumar version.


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Have VW produced any test figures yet?


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Looks like a re-badge of the £600 Tamron

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Does Spring mean 1st April 2016

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Last time I checked the average of ALL lens sales compared to body sales it was 160%. So lens sales are essential.

Nice to see how popular these PU Pi$$ing Contests are

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Can Pentax last out until Spring 2016 Even that misses the lucrative US and UK Xmas sales

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