Win a Pentax Limited Lens: Raffle Now Live!

brandontowey · 02-22-2009, 10:10 PM

In the "Cheap 200mm Zoom Comparison, FotoPete reviewed the Tokina SD 70-210 f4-5.6 and I was wondering what the SD stands for. Couldn't find it online or the forums and the curiosity is killing me. In the review, it seems as though the SD designation should deal with green and purple fringing. Thanks for any help.

**monochrome** · 02-22-2009, 10:24 PM

Originally posted by brandontowey

In the "Cheap 200mm Zoom Comparison, FotoPete reviewed the Tokina SD 70-210 f4-5.6 and I was wondering what the SD stands for. Couldn't find it online or the forums and the curiosity is killing me. In the review, it seems as though the SD designation should deal with green and purple fringing. Thanks for any help.

SD SuperLow Dispersion
Tokina mark definitions are here:Tokina

These are actually quite good general descriptions of modern lens and glass technology.

brandontowey · 02-22-2009, 10:40 PM

Great link. Thanks for the info.

Adam · 02-22-2009, 11:06 PM

Also, Pentax lenses refer to this as "ED", or extra-low dispersion. Same thing, just different abbreviations.

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 purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

noel · 02-23-2009, 06:01 AM

and for Tamron, it's in "LD" abbrev.

Taff · 02-23-2009, 07:02 AM

My initials are SD

02-22-2009, 10:10 PM	#1
brandontowey New Member Join Date: Feb 2009 Location: Brooklyn, NY Posts: 19	What Does The SD Stand When Referring To A Lense? In the "Cheap 200mm Zoom Comparison, FotoPete reviewed the Tokina SD 70-210 f4-5.6 and I was wondering what the SD stands for. Couldn't find it online or the forums and the curiosity is killing me. In the review, it seems as though the SD designation should deal with green and purple fringing. Thanks for any help.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Noob Question Difference Between a Lense That Does Macro & A True Macro Lense	Christopher M.W.T	Troubleshooting and Beginner Help	16	07-19-2009 12:20 AM
Getting the Spotmatic F to Stand	zx-m	Film SLRs and Compact Film Cameras	2	05-20-2008 09:33 AM
As I stand	dantuyhoa	Post Your Photos!	18	02-18-2008 12:30 AM
Police stand off	nathancombs	Post Your Photos!	10	08-20-2007 09:37 PM

02-22-2009, 10:24 PM	#2
monochrome Loyal Site Supporter Join Date: Mar 2008 Location: Working From Home Photos: Gallery \| Albums Posts: 26,276	Originally posted by brandontowey In the "Cheap 200mm Zoom Comparison, FotoPete reviewed the Tokina SD 70-210 f4-5.6 and I was wondering what the SD stands for. Couldn't find it online or the forums and the curiosity is killing me. In the review, it seems as though the SD designation should deal with green and purple fringing. Thanks for any help. SD SuperLow Dispersion Tokina mark definitions are here:Tokina These are actually quite good general descriptions of modern lens and glass technology.

02-22-2009, 10:40 PM	#3
brandontowey New Member Join Date: Feb 2009 Location: Brooklyn, NY Posts: 19 Original Poster	Great link. Thanks for the info.

02-22-2009, 11:06 PM	#4
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,609	Also, Pentax lenses refer to this as "ED", or extra-low dispersion. Same thing, just different abbreviations. 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 purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

02-23-2009, 06:01 AM	#5
noel Forum Member Join Date: Nov 2008 Location: Singapore Posts: 89	and for Tamron, it's in "LD" abbrev.

02-23-2009, 07:02 AM	#6
Taff Veteran Member Join Date: Aug 2008 Location: Perth Western Australia Photos: Gallery \| Albums Posts: 1,612	My initials are SD

What Does The SD Stand When Referring To A Lense?

Win a Pentax Limited Lens: Raffle Now Live!