Topic Author
Posts: 310
Joined: Tue Oct 30, 2001 4:31 am

2x Teleconverter

Tue Oct 30, 2001 7:31 pm

Dear Friends:

In a few days i will get a 2x converter, i have never used them, do they offer good quality? I have 2 lenses: 35-70mm, and a 100-300mm, will i be able to use the converter with both lenses?
Can you give me any tip when using the converter?

Thank you!

Posts: 11880
Joined: Sat Feb 24, 2001 12:01 am

RE: 2x Teleconverter

Tue Oct 30, 2001 8:27 pm

What is the f/ stop on each of these lenses. If it is something like f/4-5.6 then at longer the quality won't be too good.

I haven't got a teleconverter so i couldn't give you any tips on how to use it.


Posts: 3879
Joined: Tue Mar 18, 2008 9:21 am

RE: 2x Teleconverter

Tue Oct 30, 2001 9:51 pm

Hi Luis,

I had the same question a few weeks ago, I got some good answers.



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Joined: Mon Apr 23, 2001 10:12 pm

RE: 2x Teleconverter

Tue Oct 30, 2001 10:27 pm

I used to have a 2x TC that I used once. Expensive thing that way...
This was before the days of AF SLRs, things might have improved a bit since then, using that TC the camera would get the wrong aperture information from the lens, leaving all photos horribly underexposed.
I have since converted it to a 1" extension ring for macro work.
I wish I were flying
Posts: 1677
Joined: Fri Jan 21, 2000 9:56 am

RE: 2x Teleconverter

Wed Oct 31, 2001 5:35 am

i have a f/4-5.6 70-300mm lens, and I was planning on getting a 1.4x converter to take to DFW with this a good idea? i won't be using it all that much, just for those shots where i need a little bit more than 300mm...

jonathan d.
"my soul is in the sky" - shakespeare
da Fwog
Posts: 845
Joined: Thu Aug 19, 1999 5:25 am

RE: 2x Teleconverter

Wed Oct 31, 2001 7:44 am

a 1.4x with an F5.6 lens isn't a BAD idea - it's going to give you a max. aperture of F8, so if you already shoot mainly at F8, then you'll have an idea what to expect, shutter speed wise. The two things to bear in mind are: 1. you'll want a faster shutter speed than you're used to because of the extra length of the lens, and 2. you will lose some quality in the image.

I wouldn't recommend to anyone using a long zoom lens with a max f.stop of F5.6 to add a 2x converter (unless you're using a Canon IS lens, and adding a Canon converter) - shooting at 600mm with a max aperture of F11 is hoping for too much!

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