Coupling 2 50mm lenses

JCSullivan · 10-24-2007, 01:38 PM

I've seen people couple 2 50mm lenses. Certainly, one can't use a revering ring or a step-up or step-down so...

ChrisA · 10-24-2007, 03:06 PM

Originally posted by JCSullivan

I've seen people couple 2 50mm lenses. Certainly, one can't use a reversing ring or a step-up or step-down so...

... so you need the right sort of adapter, obviously, with a filter thread on each side.

They're quite hard to find, or they were when I looked a while back - haven't looked recently. I want one with a 49mm filter thread on both sides.

Chako · 10-25-2007, 03:21 AM

You could always make your own with a few cheap filters that you scavenge the rings off of, and a bit of epoxy.

JCSullivan · 10-25-2007, 03:44 AM

Originally posted by ChrisA

I want one with a 49mm filter thread on both sides.

Aren't we all!

Originally posted by Chako

You could always make your own with a few cheap filters that you scavenge the rings off of, and a bit of epoxy.

Damn good idea Chako.

It's always great to share thoughts. Thanks Chris and Chako.

ChrisA · 10-25-2007, 04:05 AM

Originally posted by JCSullivan

Damn good idea Chako.

It is a damn good idea. I even have a couple of cheap filters that would do the job, and the glue.

More to the point, it sounds easy enough even for me to do (and believe me, with my DIY skills, it needs to be!!).

matiki · 10-25-2007, 08:27 AM

I got my lens reversing coupler from b and h. It was cheap (I believe around $10) and works flawlessly.

Two identical focal length lenses = 1:1 reproduction!

Edit: See if this link works: coupler | B&H Photo Video

JCSullivan · 10-25-2007, 12:56 PM

Thanks Matiki but B&H doesn't really think I would be stupid enough to pay 27 bucks shipping for an 8 dollar coupler do they? They're BIGGER thieves than the ones on EB.

But hey, thanks for trying - I appreciate it.

Chako · 10-26-2007, 03:33 AM

You’re welcome.

I made my own 50mm lens reverser for macro doing the same to a 49mm filter ring and a 58mm step up ring along with some 5 minute epoxy. Works great.

**pixelsaurus** · 10-26-2007, 05:11 AM

I'm curious as to why you would want to couple 2 50mm lenses. Best outcome I can see is a 1x magnification telescope which doesn't seem very useful. Maybe I missed something.

JCSullivan · 10-26-2007, 05:30 AM

Macro experiments.

matiki · 10-26-2007, 12:20 PM

Originally posted by JCSullivan

Thanks Matiki but B&H doesn't really think I would be stupid enough to pay 27 bucks shipping for an 8 dollar coupler do they? They're BIGGER thieves than the ones on EB.

But hey, thanks for trying - I appreciate it.

I didn't notice you were in Canada.

They were quite reasonable with me, they only took my left hand.

matiki · 10-26-2007, 12:21 PM

Originally posted by pixelsaurus

I'm curious as to why you would want to couple 2 50mm lenses. Best outcome I can see is a 1x magnification telescope which doesn't seem very useful. Maybe I missed something.

It's not 1x magnification, it's 1:1 reproduction.

If a bug is 2cm long, it's 2cm long on your sensor. Thats HUGE.

This thread should help:

https://www.pentaxforums.com/forums/general-pentax-photography/10725-cheap-macro-solution-2.html

JCSullivan · 11-06-2007, 06:53 AM

I did make my own, thanks Chako. Discovered in the meantime, a good lens retaining ring remover.

I used a devider/scriber of the type used in Tool and Die/Mould making. It is strong and won't bend.

Chako · 11-06-2007, 03:19 PM

Happy to hear your off and running.

little laker · 11-06-2007, 11:23 PM

Originally posted by JCSullivan

Thanks Matiki but B&H doesn't really think I would be stupid enough to pay 27 bucks shipping for an 8 dollar coupler do they? They're BIGGER thieves than the ones on EB.

But hey, thanks for trying - I appreciate it.

I wouldn't mind getting one myself.

Living in a border town does have some advantages.
I can get it shipped to the other side for about $5.00 (we might be able to get 2 sent for the same $5.00 shipping)

I could probably throw it in an envelope for around $1.00 and mail it to you.

My guess is that the total cost including shipping, taxes and so on would probably be around the $20.00 mark each, if you'd be interested.

Let me know.

10-24-2007, 01:38 PM	#1
JCSullivan Veteran Member Join Date: Sep 2006 Location: Windsor, Canada Posts: 3,056	Coupling 2 50mm lenses I've seen people couple 2 50mm lenses. Certainly, one can't use a revering ring or a step-up or step-down so...

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10-24-2007, 03:06 PM	#2
ChrisA Veteran Member Join Date: Feb 2007 Location: London Posts: 393	Originally posted by JCSullivan I've seen people couple 2 50mm lenses. Certainly, one can't use a reversing ring or a step-up or step-down so... ... so you need the right sort of adapter, obviously, with a filter thread on each side. They're quite hard to find, or they were when I looked a while back - haven't looked recently. I want one with a 49mm filter thread on both sides.

10-25-2007, 03:21 AM	#3
Chako Inactive Account Join Date: Jul 2007 Location: Sault Ste Marie, Ont, Canada. Posts: 563	You could always make your own with a few cheap filters that you scavenge the rings off of, and a bit of epoxy.

10-25-2007, 03:44 AM	#4
JCSullivan Veteran Member Join Date: Sep 2006 Location: Windsor, Canada Posts: 3,056 Original Poster	Originally posted by ChrisA I want one with a 49mm filter thread on both sides. Aren't we all! Originally posted by Chako You could always make your own with a few cheap filters that you scavenge the rings off of, and a bit of epoxy. Damn good idea Chako. It's always great to share thoughts. Thanks Chris and Chako.

10-25-2007, 04:05 AM	#5
ChrisA Veteran Member Join Date: Feb 2007 Location: London Posts: 393	Originally posted by JCSullivan Damn good idea Chako. It is a damn good idea. I even have a couple of cheap filters that would do the job, and the glue. More to the point, it sounds easy enough even for me to do (and believe me, with my DIY skills, it needs to be!!).

10-25-2007, 08:27 AM	#6
matiki Veteran Member Join Date: Jul 2007 Location: Seattle Photos: Albums Posts: 393	I got my lens reversing coupler from b and h. It was cheap (I believe around $10) and works flawlessly. Two identical focal length lenses = 1:1 reproduction! Edit: See if this link works: coupler \| B&H Photo Video

10-25-2007, 12:56 PM	#7
JCSullivan Veteran Member Join Date: Sep 2006 Location: Windsor, Canada Posts: 3,056 Original Poster	Thanks Matiki but B&H doesn't really think I would be stupid enough to pay 27 bucks shipping for an 8 dollar coupler do they? They're BIGGER thieves than the ones on EB. But hey, thanks for trying - I appreciate it.

10-26-2007, 03:33 AM	#8
Chako Inactive Account Join Date: Jul 2007 Location: Sault Ste Marie, Ont, Canada. Posts: 563	You’re welcome. I made my own 50mm lens reverser for macro doing the same to a 49mm filter ring and a 58mm step up ring along with some 5 minute epoxy. Works great.

10-26-2007, 05:11 AM	#9
pixelsaurus Site Supporter Join Date: Jul 2007 Location: Te Kuiti, NZ Photos: Gallery \| Albums Posts: 986	I'm curious as to why you would want to couple 2 50mm lenses. Best outcome I can see is a 1x magnification telescope which doesn't seem very useful. Maybe I missed something.

10-26-2007, 05:30 AM	#10
JCSullivan Veteran Member Join Date: Sep 2006 Location: Windsor, Canada Posts: 3,056 Original Poster	Macro experiments.

10-26-2007, 12:20 PM	#11
matiki Veteran Member Join Date: Jul 2007 Location: Seattle Photos: Albums Posts: 393	Originally posted by JCSullivan Thanks Matiki but B&H doesn't really think I would be stupid enough to pay 27 bucks shipping for an 8 dollar coupler do they? They're BIGGER thieves than the ones on EB. But hey, thanks for trying - I appreciate it. I didn't notice you were in Canada. They were quite reasonable with me, they only took my left hand.

10-26-2007, 12:21 PM	#12
matiki Veteran Member Join Date: Jul 2007 Location: Seattle Photos: Albums Posts: 393	Originally posted by pixelsaurus I'm curious as to why you would want to couple 2 50mm lenses. Best outcome I can see is a 1x magnification telescope which doesn't seem very useful. Maybe I missed something. It's not 1x magnification, it's 1:1 reproduction. If a bug is 2cm long, it's 2cm long on your sensor. Thats HUGE. This thread should help: https://www.pentaxforums.com/forums/general-pentax-photography/10725-cheap-macro-solution-2.html

11-06-2007, 06:53 AM	#13
JCSullivan Veteran Member Join Date: Sep 2006 Location: Windsor, Canada Posts: 3,056 Original Poster	I did make my own, thanks Chako. Discovered in the meantime, a good lens retaining ring remover. I used a devider/scriber of the type used in Tool and Die/Mould making. It is strong and won't bend.

11-06-2007, 03:19 PM	#14
Chako Inactive Account Join Date: Jul 2007 Location: Sault Ste Marie, Ont, Canada. Posts: 563	Happy to hear your off and running.

11-06-2007, 11:23 PM	#15
little laker Veteran Member Join Date: Sep 2006 Photos: Gallery Posts: 5,697	Originally posted by JCSullivan Thanks Matiki but B&H doesn't really think I would be stupid enough to pay 27 bucks shipping for an 8 dollar coupler do they? They're BIGGER thieves than the ones on EB. But hey, thanks for trying - I appreciate it. I wouldn't mind getting one myself. Living in a border town does have some advantages. I can get it shipped to the other side for about $5.00 (we might be able to get 2 sent for the same $5.00 shipping) I could probably throw it in an envelope for around $1.00 and mail it to you. My guess is that the total cost including shipping, taxes and so on would probably be around the $20.00 mark each, if you'd be interested. Let me know.