Optics from zoom lens

photolady95 · 07-21-2009, 11:42 AM

Is there any use for these lens parts? I was thinking extension tube but have seen this only done with a teleconverter's optics. I have the main glass from the front of the lens (makes a good magnifying lens), I have two together in a tube looking object (I couldn't get them apart), and a smaller piece of glass (not sure if it magnifies or not). What can I do with them?

MattGunn · 07-21-2009, 12:38 PM

Teleconverters can be made into extension tubes as they have both parts of the bayonet mount at oposite ends of a solid tube. Broken lenses are not so easy to make use of. The optics (or at least some of them) can be used as hand hels magnifyers, the bayonet can be used to mend / modify / convert another lens. There are a lot of potenitally usefull parts in a broken lens but only if you are into lens repair.

photolady95 · 07-21-2009, 07:56 PM

Well, that answered my questions. Thanks Matt.

The one bigger lens that was in front is good for magnifying so I'll keep it for that. The other piece that has a lens at both ends would probably make a good loupe if I had a lightboard.

I guess I'll just junk the rest of it. Not much use to me torn apart like it is.

Lloydy · 07-22-2009, 11:00 AM

Take the glass out and assemble the body with a bit of card or plastic across the bottom and you have a handy pen and pencil holder for your desk.
( even better with a canonikon lens

)

MattGunn · 07-22-2009, 12:09 PM

If you stick a bit of card onto the bayonet mount, make a hole in the card, stick a bit of foil over the hole and push a pin through it and you have a pinhole lens - these can work quite well and they have NO chromatic aberration!

07-21-2009, 11:42 AM	#1
photolady95 Otis Memorial Pentaxian Join Date: May 2009 Location: Cruising the forum watching his back Photos: Gallery \| Albums Posts: 12,712	Optics from zoom lens Is there any use for these lens parts? I was thinking extension tube but have seen this only done with a teleconverter's optics. I have the main glass from the front of the lens (makes a good magnifying lens), I have two together in a tube looking object (I couldn't get them apart), and a smaller piece of glass (not sure if it magnifies or not). What can I do with them?

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07-21-2009, 12:38 PM	#2
MattGunn Veteran Member Join Date: Jun 2009 Location: Wales Photos: Gallery Posts: 347	Teleconverters can be made into extension tubes as they have both parts of the bayonet mount at oposite ends of a solid tube. Broken lenses are not so easy to make use of. The optics (or at least some of them) can be used as hand hels magnifyers, the bayonet can be used to mend / modify / convert another lens. There are a lot of potenitally usefull parts in a broken lens but only if you are into lens repair.

07-21-2009, 07:56 PM	#3
photolady95 Otis Memorial Pentaxian Join Date: May 2009 Location: Cruising the forum watching his back Photos: Gallery \| Albums Posts: 12,712 Original Poster	Well, that answered my questions. Thanks Matt. The one bigger lens that was in front is good for magnifying so I'll keep it for that. The other piece that has a lens at both ends would probably make a good loupe if I had a lightboard. I guess I'll just junk the rest of it. Not much use to me torn apart like it is.

07-22-2009, 11:00 AM	#4
Lloydy Veteran Member Join Date: Aug 2007 Location: Shropshire, UK Posts: 1,114	Take the glass out and assemble the body with a bit of card or plastic across the bottom and you have a handy pen and pencil holder for your desk. ( even better with a canonikon lens )

07-22-2009, 12:09 PM	#5
MattGunn Veteran Member Join Date: Jun 2009 Location: Wales Photos: Gallery Posts: 347	If you stick a bit of card onto the bayonet mount, make a hole in the card, stick a bit of foil over the hole and push a pin through it and you have a pinhole lens - these can work quite well and they have NO chromatic aberration!