Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
02-19-2009, 10:32 PM   #151
Veteran Member
farfisa's Avatar

Join Date: Nov 2008
Location: Toronto, Canada
Photos: Gallery
Posts: 1,274
QuoteOriginally posted by k100d Quote
the exif says 55 2.8
Yes, but then it links to the wrong pic.

02-19-2009, 10:39 PM   #152
Veteran Member




Join Date: Feb 2008
Location: Toronto
Posts: 3,915
you're right... don's got the filenames a bit mixed up
02-20-2009, 12:37 AM   #153
Inactive Account




Join Date: Mar 2008
Location: France, EU
Posts: 97
QuoteOriginally posted by dkittle Quote
Ok, I don't wanna put the lens down...

Here is a comparison with the Sigma 70mm Macro and the 77mm ltd

**You will be able to click on the image and get a full-sized version in about an hour from the time this is posted (the fullsize images are taking a LONG time to upload to my server).

....
Ok.. but where are the full sized ?
02-20-2009, 12:55 AM   #154
Pentaxian
Class A's Avatar

Join Date: Aug 2008
Location: Wellington, New Zealand
Posts: 8,937
QuoteOriginally posted by dkittle Quote
Here is a comparison with the Sigma 70mm Macro and the 77mm ltd
Thanks a lot. Great stuff.

QuoteOriginally posted by dkittle Quote
I'm less happy now that I'm reminded what the 77mm is like.
I'm a bit surprised to hear you say that. Did you expect the 55 to be better than the 77?
I'm really impressed by the quality of the 55mm shots. But then I'm crazy about sharpness and maybe missing other features. Still, I'd say the 55's performance is remarkable.

QuoteOriginally posted by dkittle Quote
The 31mm is king with being able to nail focus in the studio. I'm hoping the 55mm is as good as the 31mm and that will make it worth the price in my eyes.
I'm keeping my fingers crossed for you. Good luck.

02-20-2009, 02:16 AM   #155
TKH
Veteran Member
TKH's Avatar

Join Date: Aug 2007
Location: Germany
Posts: 371
Original Poster
QuoteOriginally posted by Alfisti Quote
Don I don't mean to be a kill sport and maybe it is just me but the bokeh is busy as hell, not to mention it "glows' around the edges. I know the grass and shrubs are hard to throw oof well but the fence and piping is a pretty poor effort IMHO. Even the word 'cafe' is nervous, almost shaking.

Maybe the Fl is just too short, that is why I found the 50/1.4 and awkward FL, it doesn't throw the background out enough. The extra reach of the 77 really helps in that regard.
First of Thanks Don for your pics.
Its very difficult to work with a lens in f1.4. Please note that the DOF is only 2 cm (later edit: wrote first 2mm) in a distance of 1m! So the most pics who dont satisfy can be possible only out of focus.

My result in playing around a few days with the DA*55? Just sold my FA43...

Rainer

Last edited by TKH; 02-20-2009 at 04:02 AM.
02-20-2009, 02:20 AM   #156
RaduA
Guest




QuoteOriginally posted by falconeye Quote
You're right, I was guesstimating. Here is how I did it:
I took the very first image of this thread (TKH's image of DA*55 at f/1.4). It is significantly softer than the same image at f/1.8 -- at the low resolution of 1200x800.
If it appears to be soft at 800 pixel height, it will not have a resolution very much in excess of 1200 LW/PH (at f/1.4). Which is a value only "fair" to "good". Not on par with the "very good" of the Sigma. More like the FA43, which is "good/very good" in the center and "poor" in the borders (fully open). Eventually, I concluded the border resolution won't exceed the center resolution

Anything wrong with my method? It was the best I could do before we get resolution measurements from test charts. Of course, I assumed that TKH has hit precise focus.
We'll see more when the first test appear but my personal opinion is that you're wrong and this puppy will have both better and more even resolution than Sigma and at least one stop or more advantage over the FA50 over the f range. And if that will be the case should I name myself "eagle eye" ? Decisions, decisions ...
BTW, on the dpreview's forum they hinted that they have one lens (the one used in one K-m pictures) and they'll test it eventually.

Regards my friend!
Radu
02-20-2009, 02:26 AM   #157
TKH
Veteran Member
TKH's Avatar

Join Date: Aug 2007
Location: Germany
Posts: 371
Original Poster
Please note a big fact:
The mistakes I make with my camera and the DA*55 are greater than the mistakes the lens makes...

Rainer
02-20-2009, 02:55 AM   #158
Veteran Member
blende8's Avatar

Join Date: Feb 2007
Location: Bremen, Germany
Photos: Albums
Posts: 1,484
Folks, I must say that the many comments about the allegedly bad bokeh are rather silly. How do you know that it's the lens and not the motive?

Judging bokeh can only be done in comparison with other lenses and this in a controlled environment (tripod ...).

I am pretty sure that the bokeh will be good, because Pentax explicitely says so.

02-20-2009, 03:10 AM   #159
Forum Member




Join Date: Oct 2008
Location: Utah
Posts: 51
QuoteOriginally posted by TKH Quote
Please note that the DOF is only 2 mm in a distance of 1m!
No offense, but I don't believe that at all.
02-20-2009, 03:12 AM   #160
Forum Member




Join Date: Oct 2008
Location: Utah
Posts: 51
QuoteOriginally posted by blende8 Quote
Folks, I must say that the many comments about the allegedly bad bokeh are rather silly. How do you know that it's the lens and not the motive?

Judging bokeh can only be done in comparison with other lenses and this in a controlled environment (tripod ...).

I am pretty sure that the bokeh will be good, because Pentax explicitely says so.
I was with you until that last sentence. It sounded like a lemming running off a cliff.
02-20-2009, 03:28 AM   #161
Pentaxian
Class A's Avatar

Join Date: Aug 2008
Location: Wellington, New Zealand
Posts: 8,937
QuoteOriginally posted by TKH Quote
Please note that the DOF is only 2 mm in a distance of 1m!
This depends on the print size and viewing distance, but the actually the figure is more like ~2.4cm.

I used this DOF calculator.

EDIT: The above figure assumes the typical manufacturer's standard for acceptable sharpness. If you apply 20/20 vision, the DOF becomes as low as 8mm in the above case.

Last edited by Class A; 02-20-2009 at 03:40 AM.
02-20-2009, 03:32 AM   #162
RaduA
Guest




QuoteOriginally posted by brucestrange Quote
No offense, but I don't believe that at all.
I think it was a typo and he meant cm instead of mm. I guess the dof is something like 2.5 cm.

Radu
02-20-2009, 03:50 AM   #163
Junior Member
clodomir's Avatar

Join Date: Feb 2009
Location: maisons laffitte 78
Posts: 31
what a nice watch ...
02-20-2009, 03:56 AM   #164
Veteran Member
blende8's Avatar

Join Date: Feb 2007
Location: Bremen, Germany
Photos: Albums
Posts: 1,484
QuoteOriginally posted by brucestrange Quote
I was with you until that last sentence. It sounded like a lemming running off a cliff.
Well, perhaps not well phrased.
What I wanted to say is that the bokeh will certainly not be particularly bad, if they put special emphasis on it.
And I don't think that this is only marketing talk.
But also we will not see wonders.
I suspect the bokeh to be similar to the FA50 or Nokton, which are basically identical.
02-20-2009, 04:01 AM   #165
TKH
Veteran Member
TKH's Avatar

Join Date: Aug 2007
Location: Germany
Posts: 371
Original Poster
QuoteOriginally posted by RaduA Quote
I think it was a typo and he meant cm instead of mm. I guess the dof is something like 2.5 cm.

Radu
Yes, my mistake. 2cm of course. Sorry.

Rainer
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
da*55, fa43, k-mount, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
FA43mm too soft? rparmar Pentax SLR Lens Discussion 33 05-22-2010 02:16 PM
To those who own the FA50mm 1.4 and the FA43mm 1.9 rustynail925 Pentax SLR Lens Discussion 31 05-20-2010 05:16 AM
Replacement for FA43mm Ltd ? Frogfish Pentax SLR Lens Discussion 11 04-22-2010 07:52 AM
For Sale - Sold: Pentax FA43mm/1.9 Ltd. heatherslightbox Sold Items 3 07-30-2009 07:17 AM



All times are GMT -7. The time now is 03:11 AM. | See also: NikonForums.com, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top