Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
11-23-2018, 01:41 PM   #1
Site Supporter
Site Supporter
Docrwm's Avatar

Join Date: Sep 2010
Location: Somewhere in the Southern US
Photos: Gallery | Albums
Posts: 12,231
Identify that lens.....

I like a mystery lens. I have to admit it. I won an auction on this lens that has lost its ID ring (see the silver ring below the focus ring). It has Tamron front and rear caps but that doesn't mean its a Tamron. EXIF data has no clues on the origin or model, I've checked.

I have shot it at both extremes and it appears to go from 70-300mm.
Its largest aperture is f4.
Rotating front element as it focuses. Not internal focus.
Has aperture ring with A setting (4-22)
Filter thread size is 58mm.
It is an AF lens and does work on my K5IIs.
AF is fast.
So, what is it?



11-23-2018, 01:51 PM   #2
Pentaxian
swanlefitte's Avatar

Join Date: May 2015
Location: New Orleans
Photos: Gallery
Posts: 2,034
Tamron 70-300mm F4-5.6 AF LD Macro Lens Reviews - Tamron Lenses - Pentax Lens Review Database

You basically answered your own question.
11-23-2018, 02:02 PM   #3
Site Supporter
Site Supporter
Docrwm's Avatar

Join Date: Sep 2010
Location: Somewhere in the Southern US
Photos: Gallery | Albums
Posts: 12,231
Original Poster
QuoteOriginally posted by swanlefitte Quote
I looked at that one but there are differences in the arrangement. In reviewing the comments this one does appear to be similar to the reviewers observations - really sharp through most of its zoom but decidedly less sharp at the lone end - and unlike the cited lens there is no indication that this one has any aspirations to being macro anything.
11-23-2018, 03:01 PM   #4
Otis Memorial Pentaxian
Loyal Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 32,191
Might it be one of the numerous Promaster 70-300/4-5.6 variants?

https://www.pentaxforums.com/userreviews/promaster-70-300mm-f4-5-6-ld.html

(Yes, the Tamron was a rebadge as well and no, Tamron did not make the Promaster/Quantaray/Whatever versions.)


Steve


Last edited by stevebrot; 11-23-2018 at 03:06 PM.
11-23-2018, 03:20 PM   #5
Site Supporter
Site Supporter
Docrwm's Avatar

Join Date: Sep 2010
Location: Somewhere in the Southern US
Photos: Gallery | Albums
Posts: 12,231
Original Poster
QuoteOriginally posted by stevebrot Quote
Might it be one of the numerous Promaster 70-300/4-5.6 variants?

Promaster 70-300mm F4-5.6 LD Lens Reviews - Miscellaneous Lenses - Pentax Lens Review Database

(Yes, the Tamron was a rebadge as well and no, Tamron did not make the Promaster/Quantaray/Whatever versions.)


Steve
It certainly could be, the zoom ring is different and, again, the name plate is at the opposite end of the lens.


New tidbit - the EXIF through the Pentax software says its a Sigma lens but no other info (not even focal length) other than f setting.
11-23-2018, 03:55 PM - 1 Like   #6
UMC
Senior Member
UMC's Avatar

Join Date: Dec 2012
Location: Vienna
Photos: Gallery
Posts: 142
I am pretty sure this is a Tarmon AF LD Tele-Macro 70-300mm 1:4-5.6 [Model 472D], which got disassembled and the zoom ring got installed upside down. The name ring of the Tamron lenses of that aera was always down, adjacent to the aperture ring. As the name ring is missing on this lens, apperenty the tinkerer who worked on this lens, got mislead and managed to install the zoom ring in the wrong orientation....
11-23-2018, 03:56 PM - 1 Like   #7
Otis Memorial Pentaxian
Loyal Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 32,191
QuoteOriginally posted by Docrwm Quote
New tidbit - the EXIF through the Pentax software says its a Sigma lens but no other info (not even focal length) other than f setting.
IIRC, Sigma is the presumed parent maker of those lenses as generic product, so that makes sense.


Steve
11-23-2018, 03:57 PM - 1 Like   #8
Loyal Site Supporter
Loyal Site Supporter
UncleVanya's Avatar

Join Date: Jul 2014
Photos: Gallery | Albums
Posts: 15,045
Weight? Filter Diameter? Minimum focus distance?

11-23-2018, 03:59 PM - 1 Like   #9
Otis Memorial Pentaxian
Loyal Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 32,191
QuoteOriginally posted by UMC Quote
the Zoom ring got installed upside down
It looks to be oriented the same way as on the Tamron (i.e. not upside down).


Steve
11-23-2018, 04:17 PM - 1 Like   #10
Loyal Site Supporter
Loyal Site Supporter
UncleVanya's Avatar

Join Date: Jul 2014
Photos: Gallery | Albums
Posts: 15,045
QuoteOriginally posted by stevebrot Quote
It looks to be oriented the same way as on the Tamron (i.e. not upside down).


Steve
Maybe the rubber is but the underlying bits may be flipped or there may be a way to leave the gap at the wrong end?
11-23-2018, 04:28 PM - 1 Like   #11
UMC
Senior Member
UMC's Avatar

Join Date: Dec 2012
Location: Vienna
Photos: Gallery
Posts: 142
QuoteOriginally posted by UncleVanya Quote
Maybe the rubber is but the underlying bits may be flipped or there may be a way to leave the gap at the wrong end?
QuoteOriginally posted by stevebrot Quote
It looks to be oriented the same way as on the Tamron (i.e. not upside down).
Steve
Look at this image 70-300mm F4-5.6 AF LD Macro - Pentax Lens Review Database
This generation of Tamron lenses (e.g. the 70-300 372D, 472D, the 28-200 71D, 171D,...) had the name ring near the aperture ring. Later generations (70-300 Model 572D, 772D and A17) had it on the front end of the zoom ring.
I still think the lens in the image is a tinkered 472D.
11-23-2018, 04:58 PM   #12
Site Supporter
Site Supporter
Docrwm's Avatar

Join Date: Sep 2010
Location: Somewhere in the Southern US
Photos: Gallery | Albums
Posts: 12,231
Original Poster
QuoteOriginally posted by UncleVanya Quote
Weight? Filter Diameter? Minimum focus distance?

As stated 58mm

510g

1.5m
11-23-2018, 05:29 PM   #13
Loyal Site Supporter
Loyal Site Supporter
UncleVanya's Avatar

Join Date: Jul 2014
Photos: Gallery | Albums
Posts: 15,045
QuoteOriginally posted by Docrwm Quote
As stated 58mm

510g

1.5m
I missed the 58mm... Whoops.
11-23-2018, 11:28 PM - 1 Like   #14
Site Supporter
Site Supporter




Join Date: Apr 2018
Location: Southern California
Posts: 9
I'll second UMC in thinking it's an incorrectly reassembled Tamron 472D. The weight, mfd and filter thread also match the earlier Tamron 70-300 4-5.6 172DM but that one lacks the striped/flanged finish on the rings and the subsequent 572D and 672D versions reportedly both have 0.95m mfd, 62 mm filter thread and weigh 453g. See this page at KEH with a somewhat blurry picture: Tamron 70-300mm F/4-5.6 LD (472D) Tele-Macro Autofocus Lens For Minolta Alpha Mount {58} at KEH Camera Store

compare with Tamron's archived brochure for the 572D at www.tamron-usa.com/assets/pdfs/572D.pdf and note how the zoom ring is shorter in that version than in the 472D, due to a fixed part of the barrel carrying a macro switch and brand+model markings in between the zoom and focus rings.

Last edited by pdeley; 11-23-2018 at 11:39 PM.
11-24-2018, 05:41 AM   #15
Site Supporter
Site Supporter
Docrwm's Avatar

Join Date: Sep 2010
Location: Somewhere in the Southern US
Photos: Gallery | Albums
Posts: 12,231
Original Poster
There are no switches on this lens. The base and aperture ring have no writing other than the A and f-stop numbers.
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!
af, k-mount, lens, pentax lens, slr lens, tamron
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Can anyone identify this lens ? Ricoh ? 400mm 5.6 ? Ronald Oakes Pentax SLR Lens Discussion 18 08-15-2018 02:48 PM
Help me identify this lens GT_IE Pentax SLR Lens Discussion 13 04-27-2018 09:02 PM
Identify this Lens.....Fun challenge Ronald Oakes Pentax SLR Lens Discussion 26 04-07-2018 04:32 PM
Help Me Identify This Lens Damage/Defect, Please pete-tarmigan Troubleshooting and Beginner Help 14 12-30-2016 07:13 AM
15 bladed lens challenge :) Can you identify this lens and mount? (Not me!) Enigmaticca Photographic Industry and Professionals 7 01-08-2012 10:57 AM



All times are GMT -7. The time now is 01:40 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