rparmar

Joined: 23rd February 2008

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rparmar
andrewk wrote:
I suspect that the reality is that all we've proven is how hard it is to test lenses and get reliable results.
Yes, this is the correct result. It is what we call "user error" or subjective variance.

Because, overall, the 18-55mm kit lens is demonstrably NOT sharper than an FA 50, or any other Pentax 50mm for that matter. Comparing MTF measures we find that the 50mm beats the kit at f/1.4, f/2, f/2.8 (er, naturally) and also at f/4. At f/5.6 and f/8 they are much the same, so long as we don't take the kit wider than 35mm. But in that case why use the zoom at all?

Some might find the differences to be negligible for their purposes. But I saw distinct improvements even in going from the kit to the DA 16-45. So I'm one of those people for whom lenses do matter. For me, shooting at f/8 to make differences between lenses negligible is to completely miss the point.

(Note: I am referring to the kit Mk I, since I have not used Mk II.)

Comment by rparmar posted on Old vs New at 10/07/2010 - 02:37

rparmar
thoramay wrote:
I could actually raise a dead phesant, but where would I get the cobwebs!!??
Your powers of avian resurrection aside, I find the best recipe for cobwebs is: SPIDER + TIME.

Comment by rparmar posted on PU - latest issue at 09/07/2010 - 20:04

rparmar
Any lens sharp corner to corner should work. My perfect lens for this application would be the FA31 but I'd have no problem using my FA43 at f/4 to f/8.

Comment by rparmar posted on Anyone use a 50mm for landscapes? at 09/07/2010 - 20:01

rparmar
philstaff wrote:
I have sent Samsung a mail asking if they upgraded there lens as Pentax did with the K20 will let you know.
They definitely do call the newer version a "II" lens, but it doesn't seem to be marked.

Comment by rparmar posted on Old vs New at 08/07/2010 - 16:20

rparmar
cardiff_gareth wrote:
In a photo mag several months ago there was an article on what focal length was best for portraits and they recommended a 200mm
Ah yes, but (almost) all of the photo mags are rubbish.

Comment by rparmar posted on Choice at 08/07/2010 - 15:03

rparmar
philstaff wrote:
Just checked mine and nothing on the lens to say its the MK 2.
The "SAMSUNG 18-55mm F3.5-5.6 D-Xenon Lens II" does not bear a distinguishing mark, but the "SMC PENTAX-DA 1:3.5-5.6 18-55mm AL II" does. I have no idea how you tell the Samsung versions apart. Anyone have both side by side?

Comment by rparmar posted on Old vs New at 08/07/2010 - 14:55

rparmar
johnriley wrote:
That's why I think it's a great pity that manufacturers don't tell us up front what the characteristics of their lenses are. If they did we could make more informed choices.
I agree, it's ridiculous. Full MTF and other specs should be made available on all lenses. The manufacturers have this info but do not release it. I think only Leica act professionally in this regard.

Comment by rparmar posted on macro at 08/07/2010 - 13:17

rparmar
Algernon, I don't get it. What have you focused on in the first image? It looks like nothing is in focus, so yeah, it's pretty soft.

Comment by rparmar posted on macro at 08/07/2010 - 01:21

rparmar
The kit zoom is good value, but I also would prefer a shot of the same subject with both so as to eliminate variables. Some lenses just get bad by f/16.

I wonder which is better at 55mm and f/4?

Comment by rparmar posted on Old vs New at 07/07/2010 - 18:36

rparmar
thoramay wrote:
What would it be used for? I can find no obvious use for me.
Street shots.

Comment by rparmar posted on cosinon-w 24mm F2.8 at 07/07/2010 - 18:28

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