I used to shoot with Tokina 28-70/2.6-2.8 ATX PRO II for Minolta is
soem past prior to converting to Canon.
I hadn't owned the other fast pro glass in this range, so used to
consider the Tokina as good as constant f/2.8 pro glass can deliver,
however, once revealed to my horror (shot the trip without my usual
high quality UV filter that I forgot to mount after clens cleaning) the
very high level of bluish cast produced by the lens. I was having hard
time processing 8 rolls of slides to get rid of that cast, punch up the
contrast that has been eaten up by that in PS.
Later I conducted a tests on color rendtion for all of my 4 leneses
(two Tokina, 1 Sigma and 1 Minolta) using well controlled lighting
condition
(a specail gretag lighting box with precisely controlled lighting
temperature inside) - this Tokina ended up having the strongest and
very noticeable cool renditon that required a good UV or Skylight to
correct.
Besides, apparently due to this reason the apparent contrast was
lacking.
As about sharpness, wide open it produced soft results, though about
1.5 - 2 stops down it became good, though nothing spectacular. My old
Minolta 28-85/3.5-4.5 produced noticeably better results on slides in
all aspects.
One thing this lens stands for - the build quality is Tkina's standard
one - apparently able to withstand a serious abuse, a war-prepared
usage.
I only realized to shall to be expecetd from a real professional glass
of this type once jumped off for Canon and acquired Canon 28-70/2.8L.
It just blew Tokina out of the water - I never realized prior to that
that I can expect so clear, razor sharp and contrasty slides.
Regards, Alex
--- "James B.Davis" <[EMAIL PROTECTED]> wrote:
> I just picked up on auction here in Japan, a Tokina 28-70 f2.8 ATX
> Pro
> lens like new, but used, for about $150 US. Just for fun really, I
> want to see if it can replace my 50 and 85 and give me a between lens
> from my 20-35 and my 100-400. I'll let you all know how it works out,
> will not receive it for a couple of days.
>
> Does anyone else on the list have one of these?
> Nice close focusing, I was suprised how heavy it actually is,
> considering they advertise it as a compact light weight lens. -
> ('Advancements in fabrication technology and the greater use of
> composite materials have created a lens that is lighter in weight')
>
> Focal length: 28mm - 70mm
> Maximum aperture: f/2.8
> Minimum aperture: f/22
> Optical construction: 16 elements in 12 groups
> Coatings: Multi-layer
> Angle of view: 75� 20� to 34�20�
> Minimum focus distance: 0.7m (27.5")
> Focusing system: Internal focusing system
> Zooming system: Rotary type
> Number of diaphragm blades: 8
> Filter size: 77mm
> Maximum outer diameter: 84mm (3.3")
> Overall length: 108mm (4.3")
> Weight: 719g (25.2oz)
>
> --
> Jim Davis, Nature Photography
> http://jimdavis.oberro.com/
> Standard Poodles for fun
> BMW motorcycle for pleasure
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