Well, I would think it performs better at f/1.2 than any other Pentax lens, Frank. Also I would bet it does not perform as well as a 1.7 around f/8.0 and f/11. That's a trade off you have to pay for the extra stop (in the case I just mentioned). My M50/1.7 is better at 1.7 and smaller than any 50/1.4 I have tested, but it does not work at all if you really need that 1/2 stop. When I was doing a lot of photography I needed that extra speed about 1-2% of the time. Just because something is more expensive does not mean it is better for general use.

Shel's K85/1.8 is probably better than an A85/1.4 for almost everything he does (except the f/1.4 gives better bragging rights).

--

frank theriault wrote:

On Mon, 6 Sep 2004 12:00:50 -0700, Shel Belinkoff
<[EMAIL PROTECTED]> wrote:

Just a thought/question: If a lens is termed "mediocre" in general, but
gives good results in a specific situation, perhaps even one for which it
was designed, is it really a mediocre lens?

For example, there is a Nikon lens for the Leica that is ideal for close
work at wide apertures. It was designed for just that purpose. Focusing
beyond a couple-three meters, and stopped down past 4.0, it's truly
mediocre, at best.  <snip>


Reminds me of someone's comment about a very fast 50mm prime (I think
it was f1.2, but I can't remember).  IIRC, they said that it's best
performance was around f 8 to f11, and that it was unusable opened
wider than f5.6 because it was so soft.

When someone asked him why he'd spent so much for an ultrafast prime,
he defended his purchase by extolling it's performance in the f8 to
f11 range, describing it as "outstanding".

I'd have respected them more if they said, "it's a great huge honking
lens, with a big front element, and it looks way cool on my body,
dude!"  <vbg>

But, other than that silly (but true) anecdote, I know what you mean,
Shel. And, I agree. It's like the infamous Takumar (bayonet) 2.5
135mm (which I never use since I got that SMC 2.5 135 from you <g>). Lots of people here think it's pretty bad. Others don't. But, since
it's often available for around $30 on eBay, and since it's relative
softness make it somewhat useful in certain situations, I don't think
it's mediocre at all. When compared against lenses costing 10 times
the amount, it's not an all-round good performer, and is rightly
considered mediocre. When price is taken into account, as well as the
fact that it's not bad for all applications, it may not be considered
mediocre.


cheers,
frank




-- graywolf http://graywolfphoto.com/graywolf.html




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