Thanks, Chris. It has been an interesting day. I just shot a few more
images with the Takumar 135 and the 2X Soligor mounted on the E-1. The
combo is lighter than my E-1 + Telyt-R 250, and is sharp when I braced on a
tree, but the Telyt wins out in image quality.
Jim Nichols
Tullahoma, TN USA
----- Original Message -----
From: "Chris Trask" <christrask@xxxxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Thursday, September 29, 2011 5:44 PM
Subject: Re: [OM] Overextending your reach
> >
>> > I'm going to set up a more definitive test later, but the first
>> > thing
> I
>> > need is a good colour chart or even better one of those lens test
> charts.
>> > Next time I drop in at the local camera shop I'll see if I can obtain
> one.
>> > I don't have a colour printer, so it's no point in downloading one.
> But,
>> > I
>> > do have a small Munsell colour circle in my copy of Sidelinger's "Color
>> > Manual" that I could use.
>> >
>>
>> I did my normal RAW image processing on the two images, and will post the
>> links below. To me, the Telyt has less contrast, but more detail. Your
>> tastes may vary from mine.
>>
>
> I went over to the local camera shop and all they had was a very
> expensive set of those sheets with the colour rectangles, which was not
> what
> I had in mind. Instead, I stopped at a nearby artist supply shop and got
> a
> pocket colour wheel used for mixing oils and water colours plus a stiff,
> dead-white piece of card stock for a background. The colour wheel has
> small
> lettering plus a bar code, which are ideal for this little exercise.
>
> Now, a bit of a correction here. My 3-element X2 teleconverter is a
> Soligor, not a Sigma as I have been saying earlier. The 7-element X2
> teleconverter is a Sigma. Our scapegoats and lackies regret the error.
> :{b
>
> The lens used here is once again a Tokina 28-70mm RMC. For the
> baseline
> photo the FL is 70mm and the aperture is f:8. For the photos with the
> three
> teleconverters the FL is 35mm and the aperture is f:5.6. Shutter speed is
> 1/500. Focusing is done at f:3.5.
>
> Clarity was judged by way of an area of fairly fine text, which
> afforded
> evaluation inevery direction on the subject plane. Compared with the
> baseline photo, the clarity with the Sigma 7-element X2 teleconverter is
> all
> but exactly the same. The Vivitar X2 telemacro is a close second, while
> the
> Soligor 3-element X2 is last.
>
> With regard to colour, the Soligor was a bit lighter in the reds and
> oranges while the Sigma and Vivitar were virtually unaltered. Yellows,
> greens, and blues were the same for all three.
>
> This test reaffirms my years-long impression of the 7-element Sigma,
> and
> gives me added confidence that the Vivitar telemacro is a worthy piece of
> field macro equipment.
>
> Chris
>
> --
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