Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
  #1
Pentax close-up lenses
Posted By: jcdoss, 09-29-2016, 05:59 PM

Does anyone know with certainty which Pentax branded close-up lenses are achromatic doublets? I know there are lists scattered hither and yon, but I'd like to be clear before I start wasting money. What about Close Up Lens #1? T80? These are available at KEH now, but I find no trustworthy info on either. I'm interested in a set of lenses at variable diopters less than +2 to carry along for impromptu close-ups when my macros aren't handy.
Views: 2,006
09-29-2016, 10:14 PM   #2
Senior Member
denik's Avatar

Join Date: Nov 2014
Location: Temple PA
Photos: Gallery | Albums
Posts: 107
From a previous post. I have also used Canon FD close up lenses which are available in 52mm size & are doublets.


With the release of the K Series in 1975 Pentax introduced a new set of close-up lenses.

Six were available in two filter thread sizes and all had SMC coatings:

S25 (52mm: K50/1.4 & K55/1.8)
S40 (52mm: K50/1.4 & K55/1.8)
T80 (52mm: K85/1.8, K105/2.8, K120/2.8, K135/3.5 & K150/4)
T95 (58mm: K135/2.5 & K200/4)
T160 (52mm: K105/2.8, K120/2.8, K135/3.5 & K150/4)
T183 (58mm: K135/2.5 & K200/4)

“S” indicates the close-up lens is for “standard” lenses and “T” is for “telephoto” lenses. The “number” indicates the focal length of the close-up lens in cm. (The distance from film to subject, the shorter the focal length the bigger the magnification.) Usable/recommended K Series lenses are in brackets.

These are great close-up accessories that look & work exactly like a Pentax SMC fitter. They take up little space in your camera bag and are perfect for close-ups if you don’t own a macro lens or extension tubes. Unlike a macro lens or extension tubes there is no exposure factor or light loss.

The highest magnification you can get with a K Series close-up lens is 0.42x with a S25 and a K55/1.8 lens. That’s close to a K50/4 or K100/4 Macro lens, which both have 0.5x magnification.

Read more at: PENTAX Close-up Lens reviews - Pentax Camera Accessory Review Database
09-30-2016, 01:30 AM   #3
Veteran Member
Nass's Avatar

Join Date: Aug 2009
Location: The British Isles
Photos: Gallery
Posts: 2,402
There's also (all for 645 system):

S33 +3 58mm
S56 +1.8 58mm
S82 +1.22 67mm
T132 +0.76 67mm
T226 +0.44 67mm

All these are coated 2 element achromats
09-30-2016, 01:49 AM   #4
dms
Site Supporter
Site Supporter




Join Date: Aug 2011
Location: New York, NY
Photos: Gallery
Posts: 2,192
I have the diopter that came with my smc 85-210 f/3.5 and it seems to be a single element. I (thus) wonder if the 35mm system diopters (not those for medium format) aren't all single elements.

09-30-2016, 02:37 AM   #5
Senior Member




Join Date: Sep 2012
Location: Montréal
Photos: Gallery
Posts: 100
QuoteOriginally posted by jcdoss Quote
Does anyone know with certainty which Pentax branded close-up lenses are achromatic doublets? I know there are lists scattered hither and yon, but I'd like to be clear before I start wasting money. What about Close Up Lens #1? T80? These are available at KEH now, but I find no trustworthy info on either. I'm interested in a set of lenses at variable diopters less than +2 to carry along for impromptu close-ups when my macros aren't handy.
List of achromatic close-up (pentax and other) here
09-30-2016, 05:36 AM   #6
Loyal Site Supporter
Loyal Site Supporter
UncleVanya's Avatar

Join Date: Jul 2014
Photos: Gallery | Albums
Posts: 28,178
QuoteOriginally posted by Sagala Quote
List of achromatic close-up (pentax and other) here
Great list!
10-03-2016, 02:03 AM   #7
Pentaxian




Join Date: Dec 2012
Photos: Gallery
Posts: 1,382
I use two 645 diopters (S33 and S56, both 58 mm filters) and they are fantastic for many lenses including some vintage zooms (Tamron Adaptall 01A and other primes and zooms in 70 - 150 range. The only downside - they are liitle heavy so I do not use them with "plastic-fantastic" lenses.

10-03-2016, 06:25 AM   #8
Pentaxian
jcdoss's Avatar

Join Date: Nov 2012
Location: Ingelheim am Rhein, Germany
Photos: Gallery | Albums
Posts: 6,687
Original Poster
Thanks everyone! After doing the math, it's looking like telephotos would get the most help from diopters of <1, and perhaps <0.5, however I can't find much information on such beasts. I have the Raynoxes, which are fantastic but far too strong for 200mm and up. Apparently, there's a set of achromatic SLR Magic diopters in 77mm threads (which is what I need) which includes two lenses, +0.33 and +1.33 which should work fine for the lenses I'd need them for. They were made for anamorphic cine lenses, so they might not be appropriate for general photography? And there's very little info on performance and quality on any format. Anyone here used them, or even heard of them?
10-03-2016, 06:38 AM   #9
Veteran Member
Nass's Avatar

Join Date: Aug 2009
Location: The British Isles
Photos: Gallery
Posts: 2,402
Never heard from them. But, if you google inside the brackets ( "SLR Magic" achromat ) the reviews do seem overwhelmingly positive. I wouldn't have thought anamorphic makes much difference, if anything the fact they can correct through these would presumably make them even better than most?
10-03-2016, 07:19 AM   #10
Loyal Site Supporter
Loyal Site Supporter
UncleVanya's Avatar

Join Date: Jul 2014
Photos: Gallery | Albums
Posts: 28,178
Unless those lenses have to have a specific orientation when attached I doubt it matters.
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!
close-up, lenses, pentax
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
SMC Pentax Zoom 45-125mm f4 Close-up Lens? mgvh Pentax SLR Lens Discussion 7 04-06-2016 04:48 AM
cheapo close up lenses jjhenders Troubleshooting and Beginner Help 18 08-11-2011 09:30 AM
Close up lenses Okami Pentax SLR Lens Discussion 5 04-23-2008 12:23 AM
For Sale - Sold: Pentax SMC &quot;M&quot; 50mm 1.7 and close-up lenses mayoapo Sold Items 2 02-22-2008 12:03 AM
Close-Up lenses pentagor Pentax Camera and Field Accessories 5 01-25-2008 11:14 AM



All times are GMT -7. The time now is 05:44 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