New long lenses or teleconverter

Started Mar 6, 2013 | Discussions
timedrun
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New long lenses or teleconverter
Mar 6, 2013

Hi, would current NX users rather see lenses coming out at longer focal lengths or see an OEM (say) 2 x teleconverter. It would be quite a convenience to double up the focal length of the existing lens bag rather than getting new lenses which might be quite large. are modern teleconverters decent optically etc?

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Ariston
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Re: New long lenses or teleconverter
In reply to timedrun, Mar 6, 2013

there are really good TC's but nothing is made for NX. also, anything above 1.4x magnification would degrade IQ drastically, including losing 2 stops of light. also using a TC would virtually makes AF painful to use. so a long lens would be a much better investment overall.

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timedrun
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Re: New long lenses or teleconverter
In reply to Ariston, Mar 6, 2013

i knew there had to be a downside to them.  thanks

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viking79
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Re: New long lenses or teleconverter
In reply to timedrun, Mar 6, 2013

TC's work best with large aperture prime lenses, for the reasons Ariston mentioned.  A 2x TC loses 2 stops, so it makes an f/2.8 lens like f/5.6, makes an f/5.6 lens like f/11.  Unusable for autofocus. We don't have any large aperture long lenses, so lets see long lenses first.

The iFn has the digital zoom capability I think now, which should cover any general purpose teleconversion (optical TC's aren't necessarily any better than digital on an inexpensive lens).

Eric

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Ariston
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Re: New long lenses or teleconverter
In reply to timedrun, Mar 7, 2013

timedrun wrote:

i knew there had to be a downside to them. thanks

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also consider you got a 20MP sensor camera, so might as well use it.

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83cat
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Re: New long lenses or teleconverter
In reply to Ariston, Mar 7, 2013

Something like 135F2.0 , 200F2.8 , 400F4.0 and with a battery powered 2x tele converter

Makes NX achieve for 270F4.0, 400F5.6, 800F8.0....

I need to save some money, maybe 1 day these comes true...

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timedrun
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Re: New long lenses or teleconverter
In reply to Ariston, Mar 7, 2013

Ariston wrote:

timedrun wrote:

i knew there had to be a downside to them. thanks

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also consider you got a 20MP sensor camera, so might as well use it.

still mainly using an nx11, so only 14.6mp.

a 2xconverter with af could be an option for the 85mm lens then. cant see samsung making one though tbh, as the 50-200mm dedicated lens is so cheap anyway.

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viking79
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Re: New long lenses or teleconverter
In reply to timedrun, Mar 7, 2013

timedrun wrote:

Ariston wrote:

timedrun wrote:

i knew there had to be a downside to them. thanks

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A little green rosetta......a tiny green rosetta........

also consider you got a 20MP sensor camera, so might as well use it.

still mainly using an nx11, so only 14.6mp.

a 2xconverter with af could be an option for the 85mm lens then. cant see samsung making one though tbh, as the 50-200mm dedicated lens is so cheap anyway.

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Exactly. I could see that fellow on here who was making the auto extension tube making one though Should ask him, I don't know his name off hand.

http://forums.dpreview.com/forums/post/50880516

A TC is basically an extension tube with some optics in it

Eric

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