retro-fitting new lenses to old cameras

jonhock · 07-22-2010, 06:18 PM

Has anybody ever used something like a PENTAX DA 18-55mm f/3.5-5.6 AL on film slr? Specificly, a ZX-50. Things like-would it actually be an 18mm to 55mm or would there be a ratio thing going on like with using older lenses on newer dslrs

.

**Lowell Goudge** · 07-22-2010, 06:41 PM

Originally posted by jonhock

Has anybody ever used something like a PENTAX DA 18-55mm f/3.5-5.6 AL on film slr? Specificly, a ZX-50. Things like-would it actually be an 18mm to 55mm or would there be a ratio thing going on like with using older lenses on newer dslrs

.

an 18-55mm lens is always an 18-55mm lens

what changes is that due to the larger fiml area, the field of view of the lens is wider and some DA lenses may not cover the entire 35mm frame

there is a thread listing the performance of DA lenses on film cameras in the lens forum

as a simple example however, I have used my sigma 10-20 mm lens which is DC rated (I.e. for ASP-C sensors only) on my PZ-1 and it shoots just fine, but vignettes below 13mm.

still on film, 13mm is awfully wide

Nick Siebers · 07-22-2010, 07:09 PM

The 18-55 (1) vignettes in an MX's viewfinder at below 24mm or so. Haven't tried it for film pics, though. I do love the DA40 on a super program and *ist.

Grimmus · 07-22-2010, 07:21 PM

Stuck a DA 16-45 on the old Super A for laughs. It acts as 16 mm (of course - can't help with techo explanation) on FF which is super wide, and vignets of course but shutter fires fine.

Nesster · 07-23-2010, 06:19 AM

I use my 16-45 on film all the time. Wider than about 21-22mm it vignettes, but I like that. Actually I bought the lens a year before I bought a K100D. You get a nice wide angle zoom.

jonhock · 08-02-2010, 02:11 PM

That's cool! The way you all are explaining it is how I'd hoped it would be. These
facts open up quite a few options in my lens buying specs and would allow me to get used to the lenses until I get the K-x I've been day-dreaming (and saving for) about!

Now, what about a DA lens on my Spotmatic F?

Mike Cash · 08-02-2010, 08:19 PM

Good luck jamming that big K-mount into the 42mm opening.

jonhock · 08-12-2010, 07:02 PM

K-x was the dream, A new (to me) K10D is the reality!
I had to do an awful lot of filing to get that DA mounted on my Spotty......

Mike Cash · 08-13-2010, 04:51 PM

Originally posted by jonhock

K-x was the dream, A new (to me) K10D is the reality!
I had to do an awful lot of filing to get that DA mounted on my Spotty......

It's your own fault for not using the right tools for the job. When you have that much metal to remove you should start with a hammer and chisel. Use the files for final finishing.

jonhock · 08-13-2010, 05:44 PM

FotoPete · 08-13-2010, 06:13 PM

Yea you can use the 18-55 safely up to about 24mm or something like that.

Nice to keep those Super and after series bodies around just for film.

jonhock · 08-13-2010, 09:19 PM

Okay, now ya'll are makin fun of me....

07-22-2010, 06:18 PM	#1
jonhock Veteran Member Join Date: Oct 2009 Location: Central Pennsylvania, USA Photos: Gallery \| Albums Posts: 420	retro-fitting new lenses to old cameras Has anybody ever used something like a PENTAX DA 18-55mm f/3.5-5.6 AL on film slr? Specificly, a ZX-50. Things like-would it actually be an 18mm to 55mm or would there be a ratio thing going on like with using older lenses on newer dslrs.

07-22-2010, 06:41 PM	#2
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,891	Originally posted by jonhock Has anybody ever used something like a PENTAX DA 18-55mm f/3.5-5.6 AL on film slr? Specificly, a ZX-50. Things like-would it actually be an 18mm to 55mm or would there be a ratio thing going on like with using older lenses on newer dslrs. an 18-55mm lens is always an 18-55mm lens what changes is that due to the larger fiml area, the field of view of the lens is wider and some DA lenses may not cover the entire 35mm frame there is a thread listing the performance of DA lenses on film cameras in the lens forum as a simple example however, I have used my sigma 10-20 mm lens which is DC rated (I.e. for ASP-C sensors only) on my PZ-1 and it shoots just fine, but vignettes below 13mm. still on film, 13mm is awfully wide

07-22-2010, 07:21 PM	#4
Grimmus Pentaxian Join Date: Jun 2010 Location: Newcastle (Aust.) Photos: Gallery \| Albums Posts: 348	there is a ratio thing Stuck a DA 16-45 on the old Super A for laughs. It acts as 16 mm (of course - can't help with techo explanation) on FF which is super wide, and vignets of course but shutter fires fine.

08-02-2010, 02:11 PM	#6
jonhock Veteran Member Join Date: Oct 2009 Location: Central Pennsylvania, USA Photos: Gallery \| Albums Posts: 420 Original Poster	Thanks, Thanks, Thanks, and....oh, Thanks! That's cool! The way you all are explaining it is how I'd hoped it would be. These facts open up quite a few options in my lens buying specs and would allow me to get used to the lenses until I get the K-x I've been day-dreaming (and saving for) about! Now, what about a DA lens on my Spotmatic F?

08-13-2010, 05:44 PM	#10
jonhock Veteran Member Join Date: Oct 2009 Location: Central Pennsylvania, USA Photos: Gallery \| Albums Posts: 420 Original Poster	Oh, Darn!

07-22-2010, 07:09 PM	#3
Nick Siebers Veteran Member Join Date: Jun 2008 Location: Madison, WI Photos: Gallery \| Albums Posts: 2,165	The 18-55 (1) vignettes in an MX's viewfinder at below 24mm or so. Haven't tried it for film pics, though. I do love the DA40 on a super program and *ist.

07-23-2010, 06:19 AM	#5
Nesster Veteran Member Join Date: Oct 2006 Location: NJ USA Photos: Gallery Posts: 13,072	I use my 16-45 on film all the time. Wider than about 21-22mm it vignettes, but I like that. Actually I bought the lens a year before I bought a K100D. You get a nice wide angle zoom.

08-02-2010, 08:19 PM	#7
Mike Cash Veteran Member Join Date: Jan 2007 Location: Japan Photos: Gallery Posts: 6,950	Good luck jamming that big K-mount into the 42mm opening.

08-12-2010, 07:02 PM	#8
jonhock Veteran Member Join Date: Oct 2009 Location: Central Pennsylvania, USA Photos: Gallery \| Albums Posts: 420 Original Poster	K-x was the dream, A new (to me) K10D is the reality! I had to do an awful lot of filing to get that DA mounted on my Spotty......

08-13-2010, 04:51 PM	#9
Mike Cash Veteran Member Join Date: Jan 2007 Location: Japan Photos: Gallery Posts: 6,950	Originally posted by jonhock K-x was the dream, A new (to me) K10D is the reality! I had to do an awful lot of filing to get that DA mounted on my Spotty...... It's your own fault for not using the right tools for the job. When you have that much metal to remove you should start with a hammer and chisel. Use the files for final finishing.

08-13-2010, 06:13 PM	#11
FotoPete Veteran Member Join Date: Feb 2007 Location: Toronto Photos: Gallery Posts: 1,774	Yea you can use the 18-55 safely up to about 24mm or something like that. Nice to keep those Super and after series bodies around just for film.

08-13-2010, 09:19 PM	#12
jonhock Veteran Member Join Date: Oct 2009 Location: Central Pennsylvania, USA Photos: Gallery \| Albums Posts: 420 Original Poster	Okay Okay, now ya'll are makin fun of me....

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