Tamron c-mount lens 75mm f3.9 on Pentax-Q7

ferrick · 09-18-2017, 11:02 PM - **9 Likes**

A very small c-mount lens with high resolution. I am impressed by its performance on such a small sensor of Q7. What do you think?

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mythguy9 · 09-19-2017, 01:54 AM

Impressive indeed!

ferrick · 09-19-2017, 02:35 AM

Originally posted by mythguy9

Impressive indeed!

Thanks!

**PJ1** · 09-19-2017, 03:53 AM - **1 Like**

Yes, there are some nice c-mount lenses around. Those are impressive shots.

ferrick · 09-19-2017, 07:43 AM

Originally posted by PJ1

Yes, there are some nice c-mount lenses around. Those are impressive shots.

I thought that only those large aperture cine lenses such as Cosmicar 75mm f1.9 can produce nice sharp image. I have never imagined that a f3.9 can produce high resolution pictures. It's a new found to in my hunt for cine lenses.

wpvv · 09-19-2017, 01:16 PM

Very nice. The bokeh is better than I would have thought.

**barondla** · 09-19-2017, 03:44 PM

Lens reproduces the world beautifully. As mentioned the bokeh is very nice. Excellent find.
Thanks for sharing
barondla

**kwb** · 09-19-2017, 05:36 PM

This is very good, nice color and details!

ferrick · 09-19-2017, 05:56 PM - **1 Like**

Originally posted by wpvv

Very nice. The bokeh is better than I would have thought.

Yes, totally agree! But it's f/3.9, not a large aperture lens. Why?

---------- Post added 09-19-17 at 05:57 PM ----------

Originally posted by barondla

Lens reproduces the world beautifully. As mentioned the bokeh is very nice. Excellent find.
Thanks for sharing
barondla

Thanks!

---------- Post added 09-19-17 at 05:59 PM ----------

Originally posted by kwb

This is very good, nice color and details!

Perhaps it's the long focal length (75mm X 4.6 crop factor) that made the bokeh looks so nice.

Piotrek K · 10-05-2017, 03:17 AM

What were the settings for these fine images - was the lens wide-open?

ferrick · 10-05-2017, 06:22 PM - **1 Like**

Originally posted by Piotrek K

What were the settings for these fine images - was the lens wide-open?

Yes, all wide open and at ISO 400. : )

Piotrek K · 10-06-2017, 01:19 AM

Thank you! Great quality for wide open!

raider · 10-07-2017, 09:48 AM

Originally posted by ferrick

A very small c-mount lens with high resolution. I am impressed by its performance on such a small sensor of Q7. What do you think?

Cool shots. How did u focus on the Q? Did you just use focus peaking on the LCD?

ferrick · 10-08-2017, 07:13 AM - **1 Like**

Originally posted by raider

Cool shots. How did u focus on the Q? Did you just use focus peaking on the LCD?

I used LCD plus enlarging mode, but not focus peaking.

raider · 10-08-2017, 07:53 AM

Originally posted by ferrick

I used LCD plus enlarging mode, but not focus peaking.

Wow. Well done. It is amazing that you can get such a sharp pic without focus peaking. Did you try to pixel peel to see if it is really "sharp"?

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09-19-2017, 01:54 AM	#2
mythguy9 Senior Member Join Date: Jun 2012 Photos: Albums Posts: 276	Impressive indeed!

09-19-2017, 02:35 AM	#3
ferrick New Member Join Date: Jul 2016 Posts: 16 Original Poster	Originally posted by mythguy9 Impressive indeed! Thanks!

09-19-2017, 03:53 AM - 1 Like	#4
PJ1 Loyal Site Supporter Join Date: Jul 2012 Location: Toowoomba, Australia Photos: Gallery \| Albums Posts: 5,484	Yes, there are some nice c-mount lenses around. Those are impressive shots.

09-19-2017, 07:43 AM	#5
ferrick New Member Join Date: Jul 2016 Posts: 16 Original Poster	Originally posted by PJ1 Yes, there are some nice c-mount lenses around. Those are impressive shots. I thought that only those large aperture cine lenses such as Cosmicar 75mm f1.9 can produce nice sharp image. I have never imagined that a f3.9 can produce high resolution pictures. It's a new found to in my hunt for cine lenses.

09-19-2017, 01:16 PM	#6
wpvv Senior Member Join Date: Jun 2012 Location: The Netherlands Posts: 251	Very nice. The bokeh is better than I would have thought.

09-19-2017, 03:44 PM	#7
barondla Site Supporter Join Date: Sep 2006 Location: midwest, United States Photos: Gallery \| Albums Posts: 5,714	Lens reproduces the world beautifully. As mentioned the bokeh is very nice. Excellent find. Thanks for sharing barondla

09-19-2017, 05:36 PM	#8
kwb Site Supporter Join Date: Mar 2015 Location: Pacific North West Photos: Gallery \| Albums Posts: 1,223	This is very good, nice color and details!

09-19-2017, 05:56 PM - 1 Like	#9
ferrick New Member Join Date: Jul 2016 Posts: 16 Original Poster	Originally posted by wpvv Very nice. The bokeh is better than I would have thought. Yes, totally agree! But it's f/3.9, not a large aperture lens. Why? ---------- Post added 09-19-17 at 05:57 PM ---------- Originally posted by barondla Lens reproduces the world beautifully. As mentioned the bokeh is very nice. Excellent find. Thanks for sharing barondla Thanks! ---------- Post added 09-19-17 at 05:59 PM ---------- Originally posted by kwb This is very good, nice color and details! Perhaps it's the long focal length (75mm X 4.6 crop factor) that made the bokeh looks so nice.

10-05-2017, 03:17 AM	#10
Piotrek K Pentaxian Join Date: Dec 2012 Photos: Gallery Posts: 1,384	What were the settings for these fine images - was the lens wide-open?

10-05-2017, 06:22 PM - 1 Like	#11
ferrick New Member Join Date: Jul 2016 Posts: 16 Original Poster	Originally posted by Piotrek K What were the settings for these fine images - was the lens wide-open? Yes, all wide open and at ISO 400. : )

10-06-2017, 01:19 AM	#12
Piotrek K Pentaxian Join Date: Dec 2012 Photos: Gallery Posts: 1,384	Thank you! Great quality for wide open!

10-07-2017, 09:48 AM	#13
raider Veteran Member Join Date: Jul 2007 Location: Perth, Australia Photos: Gallery Posts: 1,989	Originally posted by ferrick A very small c-mount lens with high resolution. I am impressed by its performance on such a small sensor of Q7. What do you think? Cool shots. How did u focus on the Q? Did you just use focus peaking on the LCD?

10-08-2017, 07:13 AM - 1 Like	#14
ferrick New Member Join Date: Jul 2016 Posts: 16 Original Poster	Originally posted by raider Cool shots. How did u focus on the Q? Did you just use focus peaking on the LCD? I used LCD plus enlarging mode, but not focus peaking.

10-08-2017, 07:53 AM	#15
raider Veteran Member Join Date: Jul 2007 Location: Perth, Australia Photos: Gallery Posts: 1,989	Originally posted by ferrick I used LCD plus enlarging mode, but not focus peaking. Wow. Well done. It is amazing that you can get such a sharp pic without focus peaking. Did you try to pixel peel to see if it is really "sharp"?