New long lenses or teleconverter

Started Mar 6, 2013 | Discussions
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timedrun Contributing Member • Posts: 683
New long lenses or teleconverter

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 Senior Member • Posts: 2,401
Re: New long lenses or teleconverter

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.

timedrun OP Contributing Member • Posts: 683
Re: New long lenses or teleconverter

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

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viking79
viking79 Forum Pro • Posts: 14,137
Re: New long lenses or teleconverter

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 Senior Member • Posts: 2,401
Re: New long lenses or teleconverter

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.

83cat New Member • Posts: 15
Re: New long lenses or teleconverter

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 OP Contributing Member • Posts: 683
Re: New long lenses or teleconverter

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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viking79
viking79 Forum Pro • Posts: 14,137
Re: New long lenses or teleconverter

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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I never saw an ugly thing in my life: for let the form of an object
be what it may - light, shade, and perspective will always make it
beautiful. - John Constable (quote)
See my Blog at: http://www.erphotoreview.com/ (bi-weekly)
Flickr Photostream: http://www.flickr.com/photos/28177041@N03/ (updated daily)

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