Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
11-08-2013, 09:29 PM   #31
Pentaxian
Digitalis's Avatar

Join Date: Mar 2009
Location: Adelaide.
Posts: 8,535
QuoteOriginally posted by steve1307 Quote
I bet your wife is pleased about that
HA! as if I'd get married at my age, i'm having too much fun being single. I figure I can ruin my life by getting married at a later stage* - statistically speaking the age range where is it socially acceptable to be romantically involved with another gets broader as you get older*.



*Personally I don't think anyone should ever get married in their twenties, early thirties at the youngest. Considering the 60% divorce rate I have seen amongst my friends that got married in their twenties - they would have been better off without the frilly dress, the vows and the cake in the first place.


Last edited by Digitalis; 11-08-2013 at 09:36 PM.
11-08-2013, 09:33 PM   #32
bxf
Pentaxian
bxf's Avatar

Join Date: Jul 2010
Location: Lisbon area
Posts: 1,041
QuoteOriginally posted by Mistral75 Quote
ED means one or several elements are made of Extra low Dispersion glass.
QuoteOriginally posted by lytrytyr Quote
Indeed, but it has another meaning as well.
In which case I guess it would mean that the glass simply isn't up to the task.
11-08-2013, 11:26 PM   #33
Veteran Member
richard balonglong's Avatar

Join Date: Aug 2007
Location: Baguio City, Philippines
Photos: Gallery
Posts: 350
QuoteOriginally posted by rlatjsrud Quote
Well I have 16-50 which used for 3 years and still fine. I'm thinking to buy 20-40 but 16-50 makes me crazy~
For me, the choice between 20-40 and 16-50 is driving me crazy!

It drives me crazy because:
16-50 is:
1. more expensive
2. bulkier and heavier
3. constant 2.8
4. has wider range in FL
20-40 is:
1. less expensive
2. smaller and is all-metal build
3. variable aperture 2.8-4
4. FL is just right
5. good looking and sexy
6. DC AF
7. Limited lens

Now, I'm really excited to see the image quality of this 20-40mm...
11-09-2013, 12:13 AM   #34
Senior Member




Join Date: Nov 2010
Location: Corvallis, OR
Photos: Albums
Posts: 247
Last night I tested aperture on my 18-135mm. (I don't have the 18-55 WR.)
Actually, I want to test the kit 18-55mm WR instead because size should be more similar compare to this limited zoom.

Result:
At 21mm the aperture is at f/4 (I tried to make it stop at 20mm but failed.)
At 31mm the aperture is at f/4.5 (Again, I tried to make it stop at 30mm but failed.)
At 41mm the aperture is at f/4.5 (Not quite sure if it was 41mm or 42mm. I have a bad memory. But I tried to make it stop at 40mm but failed.)

So that means the limited zoom is faster than 18-135mm about 1 stop at wide end, however, it's faster only 1/3 stop at long end.
Result at long end might be different than the kit 18-55mm.

11-09-2013, 12:46 AM   #35
Senior Member
deus ursus's Avatar

Join Date: Nov 2012
Location: Stårheim, Norway
Posts: 270
QuoteOriginally posted by steve1307 Quote
If you're not familiar with that particular acronym, then probably you're not affected by that particular condition .
I bet your wife is pleased about that
So the 16-45 mentioned earlier is on Viagra, then? :-)
11-09-2013, 02:37 AM - 1 Like   #36
Senior Member
Pen-A's Avatar

Join Date: Apr 2011
Posts: 133
QuoteOriginally posted by zany225 Quote
Last night I tested aperture on my 18-135mm. (I don't have the 18-55 WR.)
Actually, I want to test the kit 18-55mm WR instead because size should be more similar compare to this limited zoom.

Result:
At 21mm the aperture is at f/4 (I tried to make it stop at 20mm but failed.)
At 31mm the aperture is at f/4.5 (Again, I tried to make it stop at 30mm but failed.)
At 41mm the aperture is at f/4.5 (Not quite sure if it was 41mm or 42mm. I have a bad memory. But I tried to make it stop at 40mm but failed.)

So that means the limited zoom is faster than 18-135mm about 1 stop at wide end, however, it's faster only 1/3 stop at long end.
Result at long end might be different than the kit 18-55mm.
18-55wr:

20-32mm/f4.0 and f4.5 to 42mm
11-09-2013, 02:58 AM   #37
Site Supporter
Sandy Hancock's Avatar

Join Date: Feb 2012
Location: Adelaide Hills, South Australia
Photos: Gallery | Albums
Posts: 5,252
I bought the DA*16-50 new from B&H for $750 this time last year. Just sayin'
QuoteOriginally posted by richard balonglong Quote
20-40 is:
1. less expensive
11-09-2013, 03:01 AM   #38
Senior Member




Join Date: Nov 2010
Location: Corvallis, OR
Photos: Albums
Posts: 247
Thanks Pen-A!!

Size is not significant factor anymore.
Construction is superior. But it was compensated with price.
Speed is somewhat considerable, maybe, hmmmm, not sure. But again, price makes this lens speed looks not worth enough.

The rest I wanna see is the IQ of this zoom limited.

11-09-2013, 05:33 AM   #39
Veteran Member
richard balonglong's Avatar

Join Date: Aug 2007
Location: Baguio City, Philippines
Photos: Gallery
Posts: 350
QuoteOriginally posted by Sandy Hancock Quote
I bought the DA*16-50 new from B&H for $750 this time last year. Just sayin'
The 16-50 from B&H is $1,296... The price keeps on changing... -_-'
11-09-2013, 05:48 AM   #40
Site Supporter
Sandy Hancock's Avatar

Join Date: Feb 2012
Location: Adelaide Hills, South Australia
Photos: Gallery | Albums
Posts: 5,252
QuoteOriginally posted by richard balonglong Quote
The 16-50 from B&H is $1,296... The price keeps on changing... -_-'
Timing is everything.
11-09-2013, 05:55 AM   #41
Pentaxian
JinDesu's Avatar

Join Date: Jun 2011
Location: New York City
Photos: Gallery
Posts: 5,624
QuoteOriginally posted by Sandy Hancock Quote
Timing is everything.
Should apply to the 20-40 too.
11-09-2013, 08:39 AM   #42
Veteran Member




Join Date: Oct 2011
Posts: 818
Uh oh.... I see that the airspace on the front grouping is rather small from the pic.. And that could likely mean the lens would start to sharpen up nicely only from f/5.6 or smaller onwards... :/
Let's hope the ED elememts will really help at >f/5.6..

And since most photos are at 30mm as pointed out, i can only imagine it extending like the 16-50.. Not too attractive to me.. :P
11-09-2013, 03:05 PM   #43
sTi
Forum Member




Join Date: Feb 2011
Posts: 98
Doesn't anyone find it strange that the 20-40 contains no aspherical elements? I can't think of any modern K-mount lens which goes down to 20mm that does not have at least one aspherical element. I wonder what optical tricks Pentax employed to achieve the (hopefully) stellar optical performance without an aspherical element.
11-09-2013, 04:09 PM   #44
Pentaxian




Join Date: Nov 2011
Photos: Gallery | Albums
Posts: 3,615
QuoteOriginally posted by sTi Quote
I wonder what optical tricks Pentax employed to achieve the (hopefully) stellar optical performance without an aspherical element.
This lens has a Super-Low Dispersion (SLD) element:

PENTAX - HD PENTAX-DA 20-40mm F2.8-4 ED Limited DC WR
11-09-2013, 06:06 PM   #45
Veteran Member
NitroDC's Avatar

Join Date: Jun 2009
Posts: 342
I don't understand how anyone can speculate on the quality of this lens when no one owns one yet and no sample images have been posted at all.
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!
dc, pentax news, pentax rumors, pentax-da, ricoh, wr
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
DA limited 20-40 f/2.8-4 rlatjsrud Pentax SLR Lens Discussion 3 11-02-2013 11:04 AM
For Sale - Sold: K-5 + 18-135, 40 f/2.8 , 70mm f/2.4, 35 f/2.4, F50 f/1.7, 55-300 ED, Tamron 17-50. rrwilliams64 Sold Items 19 03-08-2013 07:09 PM
For Sale - Sold: Pentax limited DA40 DA 40mm f/2.8 DA70 70mm f/2.4 bear111111 Sold Items 7 01-20-2013 01:17 AM
For Sale - Sold: 2 Amazing lenses: DA 70mm f/2.4 Limited and FA 50mm f/2.8 Macro Nick Siebers Sold Items 5 07-17-2012 04:03 PM



All times are GMT -7. The time now is 02:54 PM. | 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