Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
10-20-2011, 06:51 AM   #1
Senior Member
LightMeter's Avatar

Join Date: Sep 2011
Location: Houston, Republic of Texas
Posts: 158
Which 45mm for 645?

I want to get a wide angle lens and debating between the Pentax 45 2.8 SMC A or the Mir-26b 45 3.5. The Mir is less expensive, but cost will be about the same considering I need to buy a Pentacon 6-645 adapter(about 50-60usd on ebay). From research I've done, the Mir is flare prone and has some barrel distortion. How's the Pentax with flare and distortion? The Pentax definitely has an advantage on filter size-67mm versus 82. The Pentax is about 2/3 stop faster on max aperture, but it's not an issue. The Mir has a huge advantage to me because I can use it with my Pentacon 6-Nikon tilt adapter. And I'd consider the Mir more of a collectible. What's your opinion?

10-20-2011, 07:29 AM   #2
Loyal Site Supporter
blackcloudbrew's Avatar

Join Date: Mar 2009
Location: Cotati, California USA
Photos: Gallery | Albums
Posts: 3,782
I can't speak to flare resistance on the 645 A 45 but it doesn't have a lot of distortion. Here is a link to my flickr site with some images shot with my 45 mm lens. Note that some of them may not be from the 45 as my record keeping isn't always spot on (I could have used the 55mm) but most of them are from the 45.

Flickr: blackcloudbrew's stuff tagged with 64545

By my estimation the 645 A 45mm is equivalent to about a 28mm on a 35mm camera. So it should not be so wide that you get a lot of distortion.

Last edited by blackcloudbrew; 10-20-2011 at 08:08 AM.
10-20-2011, 01:28 PM   #3
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 26,187
Here is a link to two of mine taken with the FA 45/2.8:

Flickr: fotostevia's stuff tagged with pentaxfa4528

My experience is that the lens is sharp, has low distortion, and great build. I would expect similar from the A version.
10-21-2011, 10:02 AM   #4
Senior Member
LightMeter's Avatar

Join Date: Sep 2011
Location: Houston, Republic of Texas
Posts: 158
Original Poster
Nice images! I'm sure the Pentax 45 is a fine lens. I'm still undecided, but there's no hurry.

10-27-2011, 07:55 PM   #5
Senior Member
LightMeter's Avatar

Join Date: Sep 2011
Location: Houston, Republic of Texas
Posts: 158
Original Poster
I decided on a Mir 26B. Bought it from someone on the MF lens forums. Looking forward to shooting with it, but will probably take at least 2 weeks from Italy. But I won't be able to use it on the 645 until i find a Pentacon 6-645 adapter and it gets here. Hope it's all here by Thanksgiving weekend for my trip.
10-28-2011, 12:56 PM   #6
Forum Member




Join Date: Sep 2009
Location: Irvine
Posts: 53
Which 45mm

I have both the Harblei (same glass inside as the Mir I think) as well as the Pentax 45mm. I haven't compared them side by side but the 45mm from Pentax isn't the sharpest Pentax lens although entirely usable. It probably my most used focal length.

My Hartblei has to be stopped down to f11 or f16 for best sharpness.

Warren
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!
advantage, camera, distortion, flare, medium format, mir, pentacon, pentax
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: Pentax-FA 645 45mm/f2.8 (Worldwide) RonHendriks1966 Sold Items 2 08-26-2011 02:25 PM
Pentax-A 645 45mm F2.8 + 645D?? kuau Pentax Medium Format 2 06-06-2011 09:51 AM
645D + 45mm 6X7 with Pentax 645-67 adaptor kuau Pentax Medium Format 32 02-04-2011 07:26 AM
For Sale - Sold: Pentax 645 FA 45mm/2.8 Lens ARCASIA Sold Items 3 10-11-2010 11:14 PM



All times are GMT -7. The time now is 09:46 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