Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
03-31-2018, 01:27 PM - 1 Like   #1
Loyal Site Supporter
Loyal Site Supporter




Join Date: May 2016
Location: East Coast
Posts: 1,635
Takumar 1.4/50 8 and 7 element comparison pics with a DA 50/1.8 too

This all got started in another thread about a week ago with a review about vintage Takumar 50mm lenses (Pentax Takumar 50mm 1.4 Review - PentaxForums.com). I mentioned I had 8 and 7 element variants of the 50, and was asked about my thoughts. That inspired me to go do some "homework" with a series of controlled shots. While I was at it, I grabbed my DA 50/1.8 to throw into the mix, since it's a lens you can get new that's kinda in the same price range you might see these vintage Takumars come up on places like eBay for. I also thought it would be fun to throw it into the mix, since it's known for being a sleeper outperforming it's price point.

I really debated on how to "process" these files. Pull into Light Room and spit back out as jpegs or take them as is out of the camera or something else? They were all shot RAW+, so options are still there, but I decided to just take the jpegs shot as "Bright" and resize them for posting in Fastone using Lanczos2 - some initial comparisons between this and pulling into LR, applying the "camera bright" profile, and exporting back out, seemed actually less sharp, so I bagged that and went with the simpler route. They were all shot with my K-1 on a tripod, 2 second self timer, and I clicked through and changed lenses as quickly as possible to keep lighting as consistent as possible, but of course, there are some slight variations as the sun did move and trees behind me intercepted some of that light causing some moving shadows - ugh! Obviously, the Takumars have no lens data, so I've named the files to indicate what they are. I started to update exif data with exiftool on the first shot, but to get rolling on this post, stopped, but as some will invariably notice, it shows an aperture on the first shot from the 8 element Takumar at 1.4 - this is why.

So, without further ado, here are 3 sample shots wide open and 3 at f 4, each group in the sequence of 8 element Takumar 1.4/50 followed by the 7 element Takumar 1.4/50 and then the DA 50/1.8. I have posted the complete series of the three lenses stopped down through f16 on Flickr here:

https://www.flickr.com/gp/148580750@N05/6jA5Dh

Attached Images
View Picture EXIF
PENTAX K-1  Photo 
View Picture EXIF
PENTAX K-1  Photo 
View Picture EXIF
PENTAX K-1  Photo 
View Picture EXIF
PENTAX K-1  Photo 
View Picture EXIF
PENTAX K-1  Photo 
View Picture EXIF
PENTAX K-1  Photo 
03-31-2018, 01:42 PM   #2
Site Supporter
Site Supporter
IgorZ's Avatar

Join Date: Aug 2015
Location: Ottawa
Posts: 1,539
Very nice, thanks for posting. I've been wondering if there was a difference between the two takumars, and to me, there is.
03-31-2018, 02:22 PM   #3
Pentaxian
aurele's Avatar

Join Date: Jan 2011
Location: Paris, France
Photos: Albums
Posts: 3,172
The 8 has small edge at pure sharpness and clarity; IMO.
03-31-2018, 03:01 PM   #4
Loyal Site Supporter
Loyal Site Supporter




Join Date: May 2016
Location: East Coast
Posts: 1,635
Original Poster
I think I agree that the 8 element does have an edge on sharpness and contrast - micro contrast? I'm still cutting my teeth on all this and find it interesting to run through different lenses and see how they perform and compare. I think all three performed quite nicely. We've got some good options!


Last edited by clickclick; 03-31-2018 at 03:42 PM.
03-31-2018, 04:46 PM   #5
Site Supporter
Site Supporter




Join Date: Jun 2013
Location: Newcastle
Photos: Gallery | Albums
Posts: 1,954
IMO the eight element is arguably sharper. It is als very hard to produce that sharpness wide open and so missed focus is IMO a common error.

This aside I find the bokeh noticeably smoother particularly around sharp contrasting boundaries. I think the above images show this.

Lastly colour saturation deficits arising from inferior coatings are a reality. In the digital era this of course is a minor point.

I give my allegiance to the eight element for the reason of bokeh alone.

Thanks for posting ��
03-31-2018, 06:48 PM   #6
GUB
Loyal Site Supporter
Loyal Site Supporter
GUB's Avatar

Join Date: Aug 2012
Location: Wanganui
Photos: Gallery | Albums
Posts: 3,093
Can't help thinking that most of the perceived differences are from slightly different exposure. Guessing that although the f stop is the same, the T stop is brighter for the more modern coated lens. This is after all partly what coatings are about - maximizing transmission of light rather than just minimizing reflective surfaces. These are screenshots in Gimp with the Histogram open. The histos are of the entire image - not just the crop shown here. Despite all that - A great comparison clickclick.
Attached Images
 
04-01-2018, 06:32 AM   #7
Loyal Site Supporter
Loyal Site Supporter




Join Date: May 2016
Location: East Coast
Posts: 1,635
Original Poster
Welcome all and thank you all for the kind words so far.

Interesting to see the histogram comparison - I hadn't thought to do that - neat - thanks!
06-16-2018, 06:03 AM   #8
abw
Forum Member




Join Date: May 2018
Location: NYC
Posts: 69
Great post - thanks for taking the time.

Great idea to post the histogram next to the image. Just looking at that, the modern lens seems to be more balanced if you will - no surprises.

I think all three lenses perform well - the DA being very concise and offering a constant result, especially for those wanting AF etc.

As for the two Taks, I definitely think the 8 has the edge - the 7 being a little softer.
But that is side-by-side comparison - if you are using either I'm sure you'd get great results!

06-18-2018, 03:17 PM - 2 Likes   #9
Loyal Site Supporter
Loyal Site Supporter




Join Date: May 2016
Location: East Coast
Posts: 1,635
Original Poster
QuoteOriginally posted by abw Quote
Great post - thanks for taking the time.
welcome and thank you

I plan on adding some more pictures with the same lenses with a more distant subject. I actually shot a series at the time of the ones here and realized when I unloaded them I had bumped the auto/manual switch on one of the lenses, and it was not stopping down like I thought. So I need to go reshoot a second batch. Soon.
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, element, element comparison pics, files, jpegs, k-mount, lenses, light, pentax lens, shot, slr lens, takumar, takumars
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Replace front element on a Takumar 50mm 1.4 8 element huibgeselschap Repairs and Warranty Service 12 12-15-2016 01:41 PM
7 element super takumar vs 8 element 50 1,4 fikkser Pentax SLR Lens Discussion 3 07-13-2013 07:59 AM
8 element vs 7 element 50mm f1.4 RMJ Troubleshooting and Beginner Help 8 09-19-2011 12:11 PM
Damaged rear lens element on F70-210, can the element be replaced? WendyB Pentax SLR Lens Discussion 13 01-05-2008 08:41 AM



All times are GMT -7. The time now is 04:41 PM. | 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