Can I use Vivitar TC for Canon FL-FD with Pentax DSLR

**hman** · 12-06-2011, 09:41 AM

I have an old (1980's) Vivitar TC 2X-4 FL-FD from my AE-1 days. Is there a way to use with K100D? Thanks!

eddie1960 · 12-06-2011, 10:22 AM

Simple answer is no. Really the only way to use FD gear now is on the various MILCs like the nex and m4/3 cameras. FD register is 42.0mm K mount is 45.46mm. so you would lose infinity without adding an optical element adapter. Not worth it for a TC, might be worth it for a fast 300

**hman** · 12-06-2011, 10:47 AM

Thanks. Will either sell or use as paperweight.

RioRico · 12-06-2011, 11:08 AM

Yes, it can be used, but not as you might expect. Remove the TC's rear mount and maybe its glass. Replace the rear mount with a cheap wide-flange M42-PK adapter. Now you can use FD lenses for macro-level shooting. Otherwise it's a paperweight. Cheers!

**Just1MoreDave** · 12-06-2011, 11:15 AM

The registration distance probably ruins any possible use. Maybe if you had a Vivitar 2X-22, you could swap mounts to have a TC with a Pentax camera side and FD lens side, but the optics would be wrong somehow.

RioRico · 12-06-2011, 11:41 AM

Originally posted by Just1MoreDave

The registration distance probably ruins any possible use... but the optics would be wrong somehow.

'Wrong' only in that infinity focus is far, far away, like the Star Wars galaxy. FD lenses are still usable -- at a couple cm away from a subject. YAML! (Yet Another Macro Lens, ay yi yi.)

12-06-2011, 09:41 AM	#1
hman Site Supporter Join Date: Jan 2010 Location: WEST CHESTER, PA Photos: Gallery Posts: 299	Can I use Vivitar TC for Canon FL-FD with Pentax DSLR I have an old (1980's) Vivitar TC 2X-4 FL-FD from my AE-1 days. Is there a way to use with K100D? Thanks!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Possible to get Canon EF lens to work on Pentax DSLR?	Julie	Pentax DSLR Discussion	5	11-01-2011 04:22 AM
How To Properly Use A Canon FF DSLR	mikemike	General Talk	10	07-01-2011 06:42 AM
Non-Canon zoom lens on Canon DSLR, what's up?	GerryL	Canon, Nikon, Sony, and Other Camera Brands	21	06-26-2010 07:23 PM
Asahi Pentax Spotmatic SLR lens adapter for Canon DSLR EOS?	emmatrim	Pentax SLR Lens Discussion	6	03-28-2010 12:43 PM
Building a new DSLR System - Pentax vs Canon considerations - Help	striker	Pentax DSLR Discussion	69	04-26-2008 03:44 AM

12-06-2011, 10:22 AM	#2
eddie1960 Veteran Member Join Date: Aug 2010 Location: Toronto Photos: Gallery \| Albums Posts: 13,666	Simple answer is no. Really the only way to use FD gear now is on the various MILCs like the nex and m4/3 cameras. FD register is 42.0mm K mount is 45.46mm. so you would lose infinity without adding an optical element adapter. Not worth it for a TC, might be worth it for a fast 300

12-06-2011, 10:47 AM	#3
hman Site Supporter Join Date: Jan 2010 Location: WEST CHESTER, PA Photos: Gallery Posts: 299 Original Poster	Thanks. Will either sell or use as paperweight.

12-06-2011, 11:08 AM	#4
RioRico Veteran Member Join Date: Jun 2008 Location: Limbo, California Posts: 11,263	Yes, it can be used, but not as you might expect. Remove the TC's rear mount and maybe its glass. Replace the rear mount with a cheap wide-flange M42-PK adapter. Now you can use FD lenses for macro-level shooting. Otherwise it's a paperweight. Cheers!

12-06-2011, 11:15 AM	#5
Just1MoreDave Site Supporter Join Date: Feb 2007 Location: Aurora, CO Photos: Gallery \| Albums Posts: 6,340	The registration distance probably ruins any possible use. Maybe if you had a Vivitar 2X-22, you could swap mounts to have a TC with a Pentax camera side and FD lens side, but the optics would be wrong somehow.

12-06-2011, 11:41 AM	#6
RioRico Veteran Member Join Date: Jun 2008 Location: Limbo, California Posts: 11,263	Originally posted by Just1MoreDave The registration distance probably ruins any possible use... but the optics would be wrong somehow. 'Wrong' only in that infinity focus is far, far away, like the Star Wars galaxy. FD lenses are still usable -- at a couple cm away from a subject. YAML! (Yet Another Macro Lens, ay yi yi.)