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02-20-2009, 02:53 PM   #196
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this with the sporadic reports of motor failure is very disconcerting

02-20-2009, 02:55 PM   #197
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QuoteOriginally posted by Buddha Jones Quote
Maybe the newer bodies will have better control over the SDM functions...
That is a possibility.. we all hope!! And though the motor is on the lenses, I guess better AF numerics and extra power could indeed improve the lens response...


wait wait wait... pentax is CRUEL!
02-20-2009, 02:57 PM   #198
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I tested it on the K10D and K20D.
The DA55 is slower than the DA16-50 even.

I have it only one day now, so I couldn't make my mind up really.
But so far it is a little disappointing.
Compared to the FA50 it is really slow.
I see difficulties for low light snap shots.

I don't want to judge the AF accuracy by now.
On the K10D it appears to be so-so.
On the K20D a little better.

I will do more tests with daylight tomorrow.

The focus throw is about twice that of the DA16-50, but a little less than that of the FA50.


Bokeh FA50 vs. DA55:
Now, what do you think, which is which? :ugh:

Last edited by blende8; 02-20-2009 at 03:20 PM.
02-20-2009, 03:37 PM   #199
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what the heck is that?

the sharpest?

02-20-2009, 04:17 PM   #200
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QuoteOriginally posted by blende8 Quote
Have received a DA55 now.
Great news!
QuoteOriginally posted by blende8 Quote
I don't want to judge the AF accuracy by now.
On the K10D it appears to be so-so.
On the K20D a little better.
[...]Bokeh FA50 vs. DA55:
That focus is slow would be less of a problem if it is more accurate in turn. I guess it would still be faster than manual, right?
Maybe, you can verify the focus while watching zoomed LiveView?

It is indeed disappointing that neither Pentax nor Sigma (for Pentax) have deployed an HSM ring motor in any of their lenses. Because a strong screw drive easily outperforms the micro-HSM type we got so far. IMHO, the DA* (with the star) all deserve a ring motor HSM.

Question: Does the DA*55 has a screw? How fast is the focus on a *istD*?

As for the bokeh: they are similiar enough that the difference can be ignored (the left one is marginally better). Both leave to be desired. If now one claims to be optimized for bokeh more than the other, then this would be a false statement.
02-20-2009, 04:40 PM   #201
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QuoteOriginally posted by blende8 Quote
Have received a DA55 now.
Slooooooow AF!
Oh, man.
Thats what I wrote. But the DA35 is slower.
Today I checked the Canon 30D of my brother in law with the Canon 85mm 1.8 against. The Canon is double so quick...
If I want to do sports, the Canon would be my choice.

But for me the Pentax is my cup of tea.
I like the IQ from the Da*




Rainer
02-20-2009, 05:37 PM   #202
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QuoteOriginally posted by kyrios Quote
Sony STF 135 does DEFINITELY have the smoothest and creamiest bokeh from that test.
rparmar, is there any Pentax lens which has similar bokeh?
I have no idea. Really, I am far from an expert on this issue. But let me venture.

The A*/ FA* 85mm F1.4 is obviously good; in a side-by-side comparisons it is somewhat better/smoother than the already excellent FA77. Not massively different, mind.

I have also seen great bokeh from the Takumar/M/F/FA 50/1.4, M 50/1.2 and Tak 55/1.8.
02-20-2009, 06:30 PM   #203
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QuoteOriginally posted by k100d Quote
this with the sporadic reports of motor failure is very disconcerting
Unforgiveable, they drop those pissy little micro motors in there instead of a true ring. Can they put the dog down for 10 minutes and call Samsung and figure this AF problem out? Hor friggin hard could it be?

02-20-2009, 06:39 PM   #204
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QuoteOriginally posted by kyrios Quote
Sony STF 135 does DEFINITELY have the smoothest and creamiest bokeh from that test.
rparmar, is there any Pentax lens which has similar bokeh?
QuoteOriginally posted by rparmar Quote
I have no idea. Really, I am far from an expert on this issue. But let me venture. [...]
I heard that the Sony STF 135 is a somewhat mythical design started by Minolta and using an unconventional aperture (not just blades, more like a filter plate with gray gradients). AFAIK, there is no other lens coming even close, from any manufacturer. BTW, "STF" stands for "Smooth Transition Focus".

The lens is so special, it has its own website and domainname:
The 135 STF

Last edited by falconeye; 02-20-2009 at 06:46 PM.
02-20-2009, 09:34 PM   #205
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QuoteOriginally posted by falconeye Quote
Question: Does the DA*55 has a screw? How fast is the focus on a *istD*?
According to the Pentax site, it's manual focus only if you don't have SDM.
02-21-2009, 02:18 AM   #206
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Yes, the DA55 is SDM-only.

Of the image above, the left is the DA, the right is the FA.
I think the difference is minimal.
02-21-2009, 06:54 AM   #207
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A few new pics:



















Rainer
02-21-2009, 07:03 AM   #208
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To my ignorant eyes, those pics leave me thinking the DA*55 can produce some beautifully smooth bokeh. Nice shots!
02-21-2009, 09:49 AM   #209
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That dog picture is quite striking. I like the lens from what I can see.
02-21-2009, 10:09 AM   #210
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QuoteOriginally posted by Votesh Quote
That dog picture is quite striking.
Thanks. The pic is @f1.4.
Its the proof: wildlife photography is possible with the DA*55...

Rainer
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