Teleconverter---> Extension tube?? - The Photo Forum

shorty6049 · 03-26-2008, 01:21 PM

does anyone know what would happen if i took all the glass out of my 2x teleconverter? would it work like an extension tube, or would the small diameter of the hole cause vignetting or something?

shorty6049 · 03-26-2008, 04:11 PM

Hey everyone, thanks for all your help, but i figured it out myself. The answer is yes you can, and yes I just did.

250Gimp · 03-27-2008, 10:31 AM

Brave!! Unless the tele was garbage all ready.

I had a feeling it would work though, as long as the glass on the camera end of the lense is smaller, or close in size to the opening in the tele.

shorty6049 · 03-27-2008, 12:11 PM

yeah i was thinking it should work too since thats pretty much all an extension tube is. Plus, the inside of it is all matte black and slightly ridged so it works as baffling so theres not too much light bouncing around , the teleconverter only cost me 40 dollars at a camera swap meet, so i didnt feel too bad about taking it apart. It still worked fine and everything, but i never really used it because it didnt seem to give me very good results on anything but my 50mm lens anyway. All the pieces are stacked in order and taped together in a case now so if i ever decide to put it back together i can, but honestly i dont really see that happening anyway... i'll post a couple other examples in a bit if anyone wanted to see them

JerryPH · 03-27-2008, 01:32 PM

Thats some SHALLOW dept of field for a F/9 shot... lol

Looks good!

Clutch · 03-27-2008, 03:01 PM

You might want to also look into a reverse adapter. I had an old Canon 50mm f/2.0 that came along with my AE-1 Program that I use the reverse adapter with. Besides, I think it's kind of amusing to find a Canon lens in my Nikon bag!

shorty6049 · 03-27-2008, 03:26 PM

Yeah, i've used a reverse adapter but i don't like how everything is manual focus and i would have to buy an old lens with a manual aperture ring on it.
with this , i can still autofocus and set aperture in-camera and i get about the same results with this as reverse macro anyway.
and to JerryPH- it SAYS f9, but was actually the DOF of f4.5 because with the teleconverter on, the lowest aperture i can set it at with a 1.7 lens was 3.5
heres a shot of a AA battery with the 18-70, probably set at around 30mm

03-26-2008, 01:21 PM	#1 (permalink)
shorty6049 TPF Junkie! Join Date: Mar 2007 Location: Minnesota Posts: 1,898 My Photos Are OK to Edit	Teleconverter---> Extension tube?? does anyone know what would happen if i took all the glass out of my 2x teleconverter? would it work like an extension tube, or would the small diameter of the hole cause vignetting or something? __________________ Be sure to visit my flickr Sony Alpha A700, Minolta 50mm f/1.7, ROKKOR f/1.4 Minolta 70-210 f/4 "beercan" Sony 18-70mm Sigma 10-20

03-26-2008, 04:11 PM	#2 (permalink)
shorty6049 TPF Junkie! Join Date: Mar 2007 Location: Minnesota Posts: 1,898 My Photos Are OK to Edit	Hey everyone, thanks for all your help, but i figured it out myself. The answer is yes you can, and yes I just did. __________________ Be sure to visit my flickr Sony Alpha A700, Minolta 50mm f/1.7, ROKKOR f/1.4 Minolta 70-210 f/4 "beercan" Sony 18-70mm Sigma 10-20

03-27-2008, 10:31 AM	#3 (permalink)
250Gimp I spend too much of my life on TPF! Join Date: Oct 2006 Location: Chelsea, Quebec Posts: 816 My Photos Are OK to Edit	Brave!! Unless the tele was garbage all ready. I had a feeling it would work though, as long as the glass on the camera end of the lense is smaller, or close in size to the opening in the tele. __________________ Take lots of pictures and you can't help but get better!!

03-27-2008, 12:11 PM	#4 (permalink)
shorty6049 TPF Junkie! Join Date: Mar 2007 Location: Minnesota Posts: 1,898 My Photos Are OK to Edit	yeah i was thinking it should work too since thats pretty much all an extension tube is. Plus, the inside of it is all matte black and slightly ridged so it works as baffling so theres not too much light bouncing around , the teleconverter only cost me 40 dollars at a camera swap meet, so i didnt feel too bad about taking it apart. It still worked fine and everything, but i never really used it because it didnt seem to give me very good results on anything but my 50mm lens anyway. All the pieces are stacked in order and taped together in a case now so if i ever decide to put it back together i can, but honestly i dont really see that happening anyway... i'll post a couple other examples in a bit if anyone wanted to see them __________________ Be sure to visit my flickr Sony Alpha A700, Minolta 50mm f/1.7, ROKKOR f/1.4 Minolta 70-210 f/4 "beercan" Sony 18-70mm Sigma 10-20

03-27-2008, 01:32 PM	#5 (permalink)
JerryPH TPF Junkie! Join Date: Oct 2007 Location: Montreal, QC, Canada Posts: 3,920 My Photos Are NOT OK to Edit	Thats some SHALLOW dept of field for a F/9 shot... lol Looks good! __________________ * Just a very enthusiastic "kinda-sorta" amateur with a Nikon * Photography 101: - a picture you place in an album - a photograph you frame and place on your wall

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03-27-2008, 03:01 PM	#6 (permalink)
Clutch No longer a newbie, moving up! Join Date: Mar 2008 Location: Watson, LA Posts: 71 My Photos Are NOT OK to Edit	The Turn Around You might want to also look into a reverse adapter. I had an old Canon 50mm f/2.0 that came along with my AE-1 Program that I use the reverse adapter with. Besides, I think it's kind of amusing to find a Canon lens in my Nikon bag! __________________ LSU Fighting Tigers NCAA Football National Champions 1958, 2003 & 2007 GEAUX TIGERS!

03-27-2008, 03:26 PM	#7 (permalink)
shorty6049 TPF Junkie! Join Date: Mar 2007 Location: Minnesota Posts: 1,898 My Photos Are OK to Edit	Yeah, i've used a reverse adapter but i don't like how everything is manual focus and i would have to buy an old lens with a manual aperture ring on it. with this , i can still autofocus and set aperture in-camera and i get about the same results with this as reverse macro anyway. and to JerryPH- it SAYS f9, but was actually the DOF of f4.5 because with the teleconverter on, the lowest aperture i can set it at with a 1.7 lens was 3.5 heres a shot of a AA battery with the 18-70, probably set at around 30mm __________________ Be sure to visit my flickr Sony Alpha A700, Minolta 50mm f/1.7, ROKKOR f/1.4 Minolta 70-210 f/4 "beercan" Sony 18-70mm Sigma 10-20

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