Tamron 60mm macro

[tennanah184187]

have you considered the tamron 90mm macro?
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Ed

 

[Gazooma]

That looks like a very nice lens for macro, and also for portraits, with its f2 and 90mm equiv focal length. The review report seems to me to be suggesting some over-optimistic rating of the speed of the lens, or whether it is actually a true f2.

Now, apparently the underexposure was caused by the camera taking the face value of this f2 value. Not a huge issue, but I was wondering whether there is some way these digital Pentax cameras can be made to do some kind of stopped down metering so as to avoid any inaccuracy in the lens aperature data. or is there another way to adjust for this without bracketing and without causing pictures taken at other apertures to be affected?

 

[Gazooma]

Another positive for this Tamron lens, compared to the Sigma lenses, is the direction in which the zoom ring is turned to close in, being the same as that for Pentax lenses.

 

[MightyMike]

actually many lenses with internal focusing systems alter their focal length quite a bit, in fact a lot more then lenses that extend... take for instance the DA18-250, its an inner focus design but when focused down to 45cm at 250mm its been reported to be more like 125mm... that said the Sigma 105mm F2.8 Macro at 1:1 is more like 65mm, however the Sigma loses less focal length(Ratio) while focusing closer and to a higher magnification... go to the Nikon forum and you'll see a whole host of complaints about the new 70-200 F2.8 and how its more like 135mm at its closest focusing distance
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Mike from Canada

'I like to think so far outside the box that it would require a telephoto lens just to see the box!' ~ 'My Quote '



http://www.airliners.net/search/photo.search?sort_order=views%20DESC&first_this_page=0&page_limit=180&&emailsearch=mighty_mike88%40hotmail.com&thumbnails=

 

[MightyMike]

impressive... i want one now
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Mike from Canada

'I like to think so far outside the box that it would require a telephoto lens just to see the box!' ~ 'My Quote '



http://www.airliners.net/search/photo.search?sort_order=views%20DESC&first_this_page=0&page_limit=180&&emailsearch=mighty_mike88%40hotmail.com&thumbnails=

 

[KentG]

According to Bob Atkins review on Photo.net at full macro it still has a 4" working distance from the front of the lens to the subject.

Also it is designed to be used an an APS-C portrait lens where the F2 speed would be a nice advantage over some other macros, equivalent to a 90/2 on Pentax, Nikon and Sony (96/2 on Canon).
Kent Gittings

 

[KentG]

Cameras don't do that with metering. The advertized aperture always adjusts for the correct exposure when the actual light is measured at photo time. Unless you have the controls set to override everything.

At full macro the lens loses about 2 full stops at 1:1 which is about normal for a macro lens.
Kent Gittings