Win a Pentax Limited Lens: Raffle Now Live!

Fenwoodian · 06-13-2018, 04:53 PM - **2 Likes**

.
Today I tested out about a dozen lenses of various focals and by different manufacturers on my new K-70 camera.

One lens stood out from the others in terms of color, bokeh, and sharpness.

My new favorite K-70 lens is the classic, highly regarded, old, cheap, Nikkor 105mm f/2.5 Ai lens. I used a Leitax adapter to make mine into a K mount.

Below is a 100% blow up from one of my test images. It's just an out of camera jpg without any photoshopping.

Attached Images

View Picture EXIF

Last edited by Fenwoodian; 06-13-2018 at 05:24 PM.

ChristianRock · 06-13-2018, 05:55 PM

Impressive indeed! Nikon does have some gorgeous lenses.

swanlefitte · 06-13-2018, 08:26 PM

I love this lens too. The focus throw is perfect and it has great bokeh and pleasing yet cool color.

wrench.doozer · 06-13-2018, 08:54 PM

It's been said before, as sensors get better good glass keeps up. I should get the adapter for my k70 to put on my nikon epiphot at work. amazingly great microscope.
what k mount is closest to the 105 nikkor? is the 105 2.8 super tak equal? (aside from mechanics like focus ring)

swanlefitte · 06-13-2018, 09:09 PM

I think the tak bokeh doesnt compare. Nikon 2.5/105 AiS vs S-M-C Takumar 2.8/105 - Fast Test @2.8

LensBeginner · 06-14-2018, 12:22 AM

Originally posted by swanlefitte

I think the tak bokeh doesnt compare. Nikon 2.5/105 AiS vs S-M-C Takumar 2.8/105 - Fast Test @2.8

It's very nice indeed.
As far as bokeh is concerned, one is smoother, the other is livelier.
More variety, more artistic choices

Fenwoodian · 06-14-2018, 10:17 AM

Originally posted by wrench.doozer

It's been said before, as sensors get better good glass keeps up. I should get the adapter for my k70 to put on my nikon epiphot at work. amazingly great microscope.
what k mount is closest to the 105 nikkor? is the 105 2.8 super tak equal? (aside from mechanics like focus ring)

Forget trying to fit a Pentax lens mount onto a Nikkor lens. Most of the time it will not work - might even damage the 3 threads in the lens.

Just spend the $95 and buy a Leitax mount. It works great on this Nikkor lens, is easy to install, and the Leitax mount is actually better quality than the original Nikkor lens mount.

LensBeginner · 06-14-2018, 10:20 AM

What's the difference, if any, between this Leitax mount you're talking about and the Pentax Multi-mount by the Adaptist?

swanlefitte · 06-14-2018, 10:45 AM - **1 Like**

The multi mount is on the camera. The leitax on the lens.

I modded my nikkor. Reversible. The leitax costs more than the lens. I probably wouldn't do it again but it was about learning for me.

**pres589** · 06-14-2018, 10:49 AM

Curious about how this lens stacks up vs. the M 85 f2. I know the focal length isn't the same.

ChristianRock · 06-14-2018, 01:12 PM

How does the Nikkor 105 do with the K-1?

normhead · 06-14-2018, 01:23 PM

How about a comparison with a DFA 100 macro?
Or Tamron 90 macro?

Fenwoodian · 06-14-2018, 01:49 PM

Originally posted by normhead

How about a comparison with a DFA 100 macro?
Or Tamron 90 macro?

I owned theSMC Pentax-D FA 100mm F2.8 Macro WR for a few years. It is a very nice lens with amazing sharpness. This Pentax macro lens is a TINY TINY bit sharper than the Nikkor. But that's where the Pentaxs' dominance ends, because with every other lens lens attribute, the Nikkor lens wins. I'd classify the Nikkor as having more of an "artistic" rendering; while the Pentax Macro lens has more of a "technical" rendering.

One of the lenses in my shootout yesterday was the famous "Bokina" lens. The Nikkor was better in every way than the Bokina, to my surprise, the Nikkor was even a bit sharper than Bokina. In fact, I soon plan to list my like-new Bokina (with close up attachment) for sale here on the PFs.

normhead · 06-14-2018, 01:53 PM

I have a thread over here with a bunch of macros.... how do you think it would have done?
Macro-bokeh-test - PentaxForums.com

Fenwoodian · 06-14-2018, 01:54 PM

Originally posted by pres589

Curious about how this lens stacks up vs. the M 85 f2. I know the focal length isn't the same.

Can't comment as I've never used the M 85mm f/2 lens.

06-14-2018, 01:49 PM	#13
Fenwoodian Pentaxian Join Date: Apr 2015 Location: USA Photos: Gallery \| Albums Posts: 2,875 Original Poster	Originally posted by normhead How about a comparison with a DFA 100 macro? Or Tamron 90 macro? I owned theSMC Pentax-D FA 100mm F2.8 Macro WR for a few years. It is a very nice lens with amazing sharpness. This Pentax macro lens is a TINY TINY bit sharper than the Nikkor. But that's where the Pentaxs' dominance ends, because with every other lens lens attribute, the Nikkor lens wins. I'd classify the Nikkor as having more of an "artistic" rendering; while the Pentax Macro lens has more of a "technical" rendering. One of the lenses in my shootout yesterday was the famous "Bokina" lens. The Nikkor was better in every way than the Bokina, to my surprise, the Nikkor was even a bit sharper than Bokina. In fact, I soon plan to list my like-new Bokina (with close up attachment) for sale here on the PFs. Last edited by Fenwoodian; 06-14-2018 at 02:03 PM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
My NEW Favorite "3D Pop" lens - the MOG TRIOPLAN	Fenwoodian	Pentax SLR Lens Discussion	5	04-02-2017 03:30 PM
Pets Favorite dog with my favorite lens	Knock	Post Your Photos!	5	02-16-2016 10:12 PM
What are your Favorite Subjects & Favorite Places to photograph?	slackercruster	General Talk	11	04-11-2012 01:58 PM
Black & White My favorite model with my favorite lens	seanix	Post Your Photos!	5	04-14-2010 06:13 PM
My new favorite lens...don't tell my 31!	Finn	Pentax SLR Lens Discussion	4	10-28-2007 10:20 AM

06-13-2018, 05:55 PM	#2
ChristianRock Pentaxian Join Date: Jul 2013 Location: People's Republic of America Photos: Gallery \| Albums Posts: 9,912	Impressive indeed! Nikon does have some gorgeous lenses.

06-13-2018, 08:26 PM	#3
swanlefitte Pentaxian Join Date: May 2015 Location: Minneapolis Photos: Gallery Posts: 4,068	I love this lens too. The focus throw is perfect and it has great bokeh and pleasing yet cool color.

06-13-2018, 08:54 PM	#4
wrench.doozer Junior Member Join Date: Sep 2017 Location: syracuse Posts: 42	It's been said before, as sensors get better good glass keeps up. I should get the adapter for my k70 to put on my nikon epiphot at work. amazingly great microscope. what k mount is closest to the 105 nikkor? is the 105 2.8 super tak equal? (aside from mechanics like focus ring)

06-13-2018, 09:09 PM	#5
swanlefitte Pentaxian Join Date: May 2015 Location: Minneapolis Photos: Gallery Posts: 4,068	I think the tak bokeh doesnt compare. Nikon 2.5/105 AiS vs S-M-C Takumar 2.8/105 - Fast Test @2.8

06-14-2018, 12:22 AM	#6
LensBeginner Veteran Member Join Date: Sep 2014 Photos: Albums Posts: 4,696	Originally posted by swanlefitte I think the tak bokeh doesnt compare. Nikon 2.5/105 AiS vs S-M-C Takumar 2.8/105 - Fast Test @2.8 It's very nice indeed. As far as bokeh is concerned, one is smoother, the other is livelier. More variety, more artistic choices

06-14-2018, 10:17 AM	#7
Fenwoodian Pentaxian Join Date: Apr 2015 Location: USA Photos: Gallery \| Albums Posts: 2,875 Original Poster	Originally posted by wrench.doozer It's been said before, as sensors get better good glass keeps up. I should get the adapter for my k70 to put on my nikon epiphot at work. amazingly great microscope. what k mount is closest to the 105 nikkor? is the 105 2.8 super tak equal? (aside from mechanics like focus ring) Forget trying to fit a Pentax lens mount onto a Nikkor lens. Most of the time it will not work - might even damage the 3 threads in the lens. Just spend the $95 and buy a Leitax mount. It works great on this Nikkor lens, is easy to install, and the Leitax mount is actually better quality than the original Nikkor lens mount.

06-14-2018, 10:20 AM	#8
LensBeginner Veteran Member Join Date: Sep 2014 Photos: Albums Posts: 4,696	What's the difference, if any, between this Leitax mount you're talking about and the Pentax Multi-mount by the Adaptist?

06-14-2018, 10:45 AM - 1 Like	#9
swanlefitte Pentaxian Join Date: May 2015 Location: Minneapolis Photos: Gallery Posts: 4,068	The multi mount is on the camera. The leitax on the lens. I modded my nikkor. Reversible. The leitax costs more than the lens. I probably wouldn't do it again but it was about learning for me.

06-14-2018, 10:49 AM	#10
pres589 Site Supporter Join Date: Jan 2014 Location: Wichita, KS Photos: Albums Posts: 4,533	Curious about how this lens stacks up vs. the M 85 f2. I know the focal length isn't the same.

06-14-2018, 01:12 PM	#11
ChristianRock Pentaxian Join Date: Jul 2013 Location: People's Republic of America Photos: Gallery \| Albums Posts: 9,912	How does the Nikkor 105 do with the K-1?

06-14-2018, 01:23 PM	#12
normhead Pentaxian Join Date: Jun 2007 Location: Near Algonquin Park Photos: Gallery \| Albums Posts: 40,451	How about a comparison with a DFA 100 macro? Or Tamron 90 macro?

06-14-2018, 01:53 PM	#14
normhead Pentaxian Join Date: Jun 2007 Location: Near Algonquin Park Photos: Gallery \| Albums Posts: 40,451	I have a thread over here with a bunch of macros.... how do you think it would have done? Macro-bokeh-test - PentaxForums.com

06-14-2018, 01:54 PM	#15
Fenwoodian Pentaxian Join Date: Apr 2015 Location: USA Photos: Gallery \| Albums Posts: 2,875 Original Poster	Originally posted by pres589 Curious about how this lens stacks up vs. the M 85 f2. I know the focal length isn't the same. Can't comment as I've never used the M 85mm f/2 lens.