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jsherman999 · 09-12-2014, 11:01 AM

Link: New Nikon (FF) 20mm f/1.8G - impressive MTF wide-open

Not cheap at $799 initial MSRP, but not break-bank either. I expect discounts at some point... nice option to replace my 20 f/2.8D, maybe.

.

Adam · 09-12-2014, 12:38 PM

Nice! They might launch a rebate for black Friday- but compared to the F1.4 lenses this is already cheap enough considering that it's an ultra-wide IMO!

jsherman999 · 09-12-2014, 02:33 PM

Originally posted by Adam

Nice! They might launch a rebate for black Friday- but compared to the F1.4 lenses this is already cheap enough considering that it's an ultra-wide IMO!

They must have priced it right because I keep thinking of buying it

Ian Stuart Forsyth · 09-13-2014, 09:55 PM

It came in cheaper than I imagined

bossa · 09-13-2014, 10:38 PM

the red line is contrast whereas the blue is resolution and I'm not at all impressed with that blue line. There's a lot of astigmatism and a steady fall off in resolution to the edge. But as this is probably wide-open it's probably not that bad when stopped down

osv · 09-14-2014, 12:51 PM

those mtf numbers are ff(?)... crop sensor performance could be astounding.

thx for the post.

Andi Lo · 09-14-2014, 05:52 PM

Very reasonably priced lens for what it is....

tuco · 09-27-2014, 12:43 PM

Expensive? A Pentax 15mm f4 DA ED AL ltd can sell new for, what, close to $700 USD? And still not as fast or wide ( on a Pentax camera) as this 20mm is for its format.

**Digitalis** · 09-27-2014, 08:34 PM

I don't think so - the 28mm f/1.8 has more slightly contrast than the 20mm prime. Also the Nikkor 20mm f/1.8 distortion characteristic will be of interest, as the 28mm has visible distortion.

Originally posted by bossa

But as this is probably wide-open it's probably not that bad when stopped down

You will need to stop down even more to compensate for the field curvature.

09-12-2014, 11:01 AM	#1
jsherman999 Veteran Member Join Date: Dec 2007 Photos: Gallery Posts: 8,237	New Nikon 20mm f/1.8G - impressive MTF wide-open Link: New Nikon (FF) 20mm f/1.8G - impressive MTF wide-open Not cheap at $799 initial MSRP, but not break-bank either. I expect discounts at some point... nice option to replace my 20 f/2.8D, maybe. .

09-12-2014, 12:38 PM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	Nice! They might launch a rebate for black Friday- but compared to the F1.4 lenses this is already cheap enough considering that it's an ultra-wide IMO! Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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09-12-2014, 02:33 PM	#3
jsherman999 Veteran Member Join Date: Dec 2007 Photos: Gallery Posts: 8,237 Original Poster	Originally posted by Adam Nice! They might launch a rebate for black Friday- but compared to the F1.4 lenses this is already cheap enough considering that it's an ultra-wide IMO! They must have priced it right because I keep thinking of buying it

09-13-2014, 09:55 PM	#4
Ian Stuart Forsyth Pentaxian Join Date: May 2009 Location: Somewhere over the rainbow Photos: Gallery Posts: 1,531	It came in cheaper than I imagined

09-13-2014, 10:38 PM	#5
bossa Veteran Member Join Date: Jul 2011 Location: Adelaide Posts: 4,546	the red line is contrast whereas the blue is resolution and I'm not at all impressed with that blue line. There's a lot of astigmatism and a steady fall off in resolution to the edge. But as this is probably wide-open it's probably not that bad when stopped down

09-14-2014, 12:51 PM	#6
osv Veteran Member Join Date: Mar 2007 Location: So Cal Photos: Gallery Posts: 2,080	those mtf numbers are ff(?)... crop sensor performance could be astounding. thx for the post.

09-14-2014, 05:52 PM	#7
Andi Lo Veteran Member Join Date: Jul 2008 Location: Halifax, Nova Scotia Posts: 2,924	Very reasonably priced lens for what it is....

09-27-2014, 12:43 PM	#8
tuco Pentaxian Join Date: Jul 2009 Location: Pugetopolis Posts: 11,032	Expensive? A Pentax 15mm f4 DA ED AL ltd can sell new for, what, close to $700 USD? And still not as fast or wide ( on a Pentax camera) as this 20mm is for its format.

09-27-2014, 08:34 PM	#9
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,694	I don't think so - the 28mm f/1.8 has more slightly contrast than the 20mm prime. Also the Nikkor 20mm f/1.8 distortion characteristic will be of interest, as the 28mm has visible distortion. Originally posted by bossa But as this is probably wide-open it's probably not that bad when stopped down You will need to stop down even more to compensate for the field curvature.

New Nikon 20mm f/1.8G - impressive MTF wide-open

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