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Re: [OM] Olympus B-300 + 2xA +135/2.8 -> 460/5.6+

Subject: Re: [OM] Olympus B-300 + 2xA +135/2.8 -> 460/5.6+
From: "George M. Anderson" <george@xxxxxxxxxxxxxxxxxx>
Date: Mon, 17 May 1999 09:00:56 -0700
Olaf;

Gary Reese has tested the 135/2.8 + Zuiko 2X.  Results were pretty bad.

George

Olaf Greve wrote:
> 
> Hi,
> 
> Over the last few days I had some off-list message interchanges with Hans
> van Veluwen (and to a lesser extent with Frank Lindert) about how to use
> teleconverters to obtain a "poor man's super telephoto lens".
> 
> Well, just today I may have figured out a great combo. If my understanding
> of matters is correct, the Zuiko 2xA TC is matched for the 135/2.8, which
> yields a 270/5.6 telephoto lens. Then further adding the B-300 TC (which
> reportedly works very well with the 135/2.8) gives another 1.7 amplification
> with almost no light loss, thus yielding a 460/5.6+ super telephoto combo!
> 
> Now for some comparison against the two nearest matching fixed super
> telephoto lenses:
> 
> Weight:
> ------
> -135/2.8 = 360 gr.
>  2xA = 215 gr.
>  B-300 = ?? gr.
>  Total = 575 + X gr.
> 
> -400/6.3 = 1300 gr.
> -500/8 = 590 gr.
> 
> Length:
> ------
> -135/2.8 = 80mm
>  2xA = 48mm
>  B-300 = ?? mm
>  Total = 128 + Y mm
> 
> -400/6.3 = 255 mm
> -500/8 = 97 mm
> 
> Now, I would say that if this combo doesn't have any negative effects from
> the TCs, it is an excellent alternative for the above fixed lenses! Even
> when stopping down the combo 2 stops (to get rid of potentially poor wide
> open diafragm performance), you would still have a 460/8 lens!
> 
> In weight and size this will then most likely not differ much from the
> 500/8, and you have the added advantage of having a selectable diafragm.
> Furthermore, there will not be any doughnut-like light effects and
> financially spoken the combo will probably also be cheaper...
> 
> Needless to say, when bringing this combo you can also use any of the other
> combos the set provides for (i.e. 135/2.8, 230/2.8+, 270/5.6).
> 
> Now, am I terribly mistaken or is it just an exotic combination simply noone
> has thought of before?
> 
> Also, if anyone can test this combo, I'd be more than interested to see
> results of that...
> 
> Cheers!
> Olaf
> 
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