Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
03-01-2018, 12:25 AM   #1
Senior Member




Join Date: Feb 2007
Location: Monterey County, California
Posts: 112
K-1 and the DA 20-40?

In the discussions regarding do DA lenses cover the full-frame sensor, the DA 20-40 gets passed over. In some recent threads it does get mentioned by people who use that combo, but the information is conflicting (at least Iím confused by it) and no one has posted pictures with that combo here on the forum. So my question is, does the DA 20-40 cover the full sensor on the K-1? Iím still looking for an affordable full-frame equivalent of the DA 15 on APS-C. The FA 20s are out there on e-Bay, but $800-900 is a bit steep for used lenses.

03-01-2018, 12:51 AM   #2
Moderator
Site Supporter
Loyal Site Supporter
Sandy Hancock's Avatar

Join Date: Feb 2012
Location: Adelaide Hills, South Australia
Photos: Gallery | Albums
Posts: 7,990
Forget it. It's a crop lens.
Look for a FA20-35/4.0
03-01-2018, 01:16 AM   #3
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 48,759
Negative, at 20mm and 40mm it's pretty far from delivering FF coverage.

I second the 20-35mm recommendation. IMO the FA 20mm isn't worth that price because its corner/wide-aperture performance isn't up to modern standards.

I'm sure this is part of the reason that there a wide prime roadmapped.

Adam
PentaxForums.com Webmaster (Site Usage Guide | Site Help | My Photography)



PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

03-01-2018, 02:04 AM   #4
Moderator
Site Supporter
Loyal Site Supporter
Sandy Hancock's Avatar

Join Date: Feb 2012
Location: Adelaide Hills, South Australia
Photos: Gallery | Albums
Posts: 7,990
QuoteOriginally posted by Adam Quote
IMO the FA 20mm isn't worth that price because its corner/wide-aperture performance isn't up to modern standards.
I beg to differ.

Have a look at THIS ALBUM. Nothing fancy, but some decent IQ.

03-01-2018, 02:48 AM   #5
Loyal Site Supporter
Loyal Site Supporter
twilhelm's Avatar

Join Date: Feb 2009
Location: Florida
Photos: Gallery | Albums
Posts: 2,307
I’ll post a few if needed, but it covers FF extremely well in my opinion. Especially from about 24-37mm and up to about f11.
03-01-2018, 02:54 AM - 1 Like   #6
Moderator
Site Supporter
Loyal Site Supporter
Sandy Hancock's Avatar

Join Date: Feb 2012
Location: Adelaide Hills, South Australia
Photos: Gallery | Albums
Posts: 7,990
QuoteOriginally posted by twilhelm Quote
Iíll post a few if needed, but it covers FF extremely well in my opinion. Especially from about 24-37mm and up to about f11.
In other words, it's a crop lens.
03-01-2018, 02:56 AM   #7
Site Supporter
Site Supporter




Join Date: Nov 2015
Photos: Albums
Posts: 1,260
Iím partial to my Tokina 20-35.

It was affordable and gives good results. It does flare, so best if you can find a hood, but it will tide me over until the new wide is released.

-Eric
03-01-2018, 03:27 AM   #8
Loyal Site Supporter
Loyal Site Supporter
twilhelm's Avatar

Join Date: Feb 2009
Location: Florida
Photos: Gallery | Albums
Posts: 2,307
Yes, the 20-40 is a crop lens, but I found is usable FF, especially compared to the 50-135 or 17-70.

03-01-2018, 03:27 AM - 2 Likes   #9
pid
Pentaxian




Join Date: Jan 2010
Photos: Gallery
Posts: 315
QuoteOriginally posted by Sandy Hancock Quote
I beg to differ.

Have a look at THIS ALBUM. Nothing fancy, but some decent IQ.
... the FA 20/2.8 and the A 20/2.8 are both deliver very good on the K-1. The problem is they are hard to get. I love my A20/2.8 and it is no problem to focus manually. The 5 aperture blades of the A 20/2.8 make nicer stars than the 6 aperture blades of the newer but optical identical FA 20/2.8
03-01-2018, 08:02 AM   #10
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 48,759
QuoteOriginally posted by Sandy Hancock Quote
I beg to differ.

Have a look at THIS ALBUM. Nothing fancy, but some decent IQ.
I'd definitely agree that it's decent enough, but not $800 decent

Adam
PentaxForums.com Webmaster (Site Usage Guide | Site Help | My Photography)



PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

03-01-2018, 01:22 PM - 1 Like   #11
Moderator
Site Supporter
Loyal Site Supporter
Sandy Hancock's Avatar

Join Date: Feb 2012
Location: Adelaide Hills, South Australia
Photos: Gallery | Albums
Posts: 7,990
I guess that while it is the only option, the market says it is
03-01-2018, 04:57 PM - 1 Like   #12
Loyal Site Supporter
Loyal Site Supporter
clackers's Avatar

Join Date: Jul 2013
Location: Melbourne
Photos: Albums
Posts: 13,234
QuoteOriginally posted by twilhelm Quote
Yes, the 20-40 is a crop lens, but I found is usable FF, especially compared to the 50-135 or 17-70.
By the sound of it, at the very least you're getting a WR, silent focus 24mm and 35mm prime in one, which are both lacking in the lineup at the moment.

Pair it with the DA*55 and DFA 100 Macro for a three lens hiking setup.
03-01-2018, 05:29 PM   #13
Lens Hoarder
Loyal Site Supporter
monochrome's Avatar

Join Date: Mar 2008
Location: St. Louis, MO
Photos: Gallery | Albums
Posts: 24,722
QuoteOriginally posted by Sandy Hancock Quote
Forget it. It's a crop lens.
Look for a FA20-35/4.0
FA20-35/4 = $665 - $735 eBay ( with typical $2,200 outlier). It ain’t cheap - FA20 * 1.5 ballpark.
03-01-2018, 06:45 PM - 1 Like   #14
Loyal Site Supporter
Loyal Site Supporter
Ex Finn.'s Avatar

Join Date: Nov 2007
Location: Southern Maryland.
Photos: Gallery | Albums
Posts: 7,505
The DA20-40ltd does look nice on the K1 Pardon the noise, forgot that it was set to ISO 12800 with high ISO NR off.
Attached Images
View Picture EXIF
PENTAX KP  Photo 

Last edited by Ex Finn.; 03-01-2018 at 06:51 PM.
03-01-2018, 07:06 PM   #15
Loyal Site Supporter
Loyal Site Supporter
Ex Finn.'s Avatar

Join Date: Nov 2007
Location: Southern Maryland.
Photos: Gallery | Albums
Posts: 7,505
QuoteOriginally posted by BWG Quote
So my question is, does the DA 20-40 cover the full sensor on the K-1?
In a very limited range, from my early haphazard test.
Attached Images
View Picture EXIF
PENTAX K-1  Photo 
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!
combo, da, da 20-40, dslr, full frame, full-frame, k-1, k1, lenses, pentax k-1, sensor
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Is the new DA 20-40mm a worthy alternative to the DA 21 and DA 40 ltd? Bui Pentax SLR Lens Discussion 32 08-07-2017 02:01 PM
DA 40, 20-40 or DA 70 ? Fotorix Pentax SLR Lens Discussion 41 09-23-2015 11:52 AM
Compare the FA 20-35 and DA 20-40 jeverettfine Pentax SLR Lens Discussion 66 05-10-2015 11:44 PM



All times are GMT -7. The time now is 01:21 AM. | See also: NikonForums.com, CanonForums.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