A7K (Kolari thin filter modification) -how it stacks up

pinholecam · 07-25-2015, 01:23 AM - **1 Like**

For those wondering how this conversion affects legacy SLR and RF lenses, I started a review on the local forums on this topic.

A Review of the A7K (Kolari Thin Filter Conversion)

Up till this point, I am pleasantly surprised on how much more it improves SLR lenses on the off center than RF ones.

osv · 07-25-2015, 08:12 AM

wow, that is surprising!

thx for the post.

**jbondo** · 07-25-2015, 01:06 PM

Perhaps relevant: LensRentals.com - Sensor Stack Thickness: When Does It Matter?
Some film-era lenses seem to do a lot better with thin, but it seems to depend a lot upon the specific lens formula. Some legacy lenses seem fine with the thicker ones.

pinholecam · 07-25-2015, 05:02 PM

Originally posted by osv

wow, that is surprising!

thx for the post.

Indeed.
I got quite a few SLR and RF wides to run through and will update the post when I get to them.

Originally posted by jbondo

Perhaps relevant: LensRentals.com - Sensor Stack Thickness: When Does It Matter?
Some film-era lenses seem to do a lot better with thin, but it seems to depend a lot upon the specific lens formula. Some legacy lenses seem fine with the thicker ones.

Yes, I'd think this is the case.
Its a lens+camera interaction.
Nothing is for sure with the mod.
The modification just tries to get to what is possible on camera 'right'.
Thats only half the equation.

pinholecam · 07-28-2015, 03:35 PM

I updated the review with samples of the CV25/4 color skopar and the Pentax K28/3.5.

Strange journey for me indeed.
I am nothing but awestruck by what the SLR lenses can get on the modded camera, esp with already very good lenses like the K28/3.5
The o/p (in terms of sharpness) reminds me so much of my DP1m.
Practically, other than color representation in good light, I get the feeling that this camera all but makes the DP1m irrelevant for my usage (sadly).

I should be able to get hold of a A7 (unmodded) towards the end of the week to compare more lenses again.

Cheers!

pinholecam · 07-30-2015, 04:05 PM

Updated again with another more positive test with the CV15v1 and the CV35/1.4 Nokton

07-25-2015, 01:23 AM - 1 Like	#1
pinholecam Pentaxian Join Date: Oct 2009 Location: North Photos: Gallery Posts: 4,706	A7K (Kolari thin filter modification) -how it stacks up For those wondering how this conversion affects legacy SLR and RF lenses, I started a review on the local forums on this topic. A Review of the A7K (Kolari Thin Filter Conversion) Up till this point, I am pleasantly surprised on how much more it improves SLR lenses on the off center than RF ones.

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07-25-2015, 08:12 AM	#2
osv Veteran Member Join Date: Mar 2007 Location: So Cal Photos: Gallery Posts: 2,080	wow, that is surprising! thx for the post.

07-25-2015, 01:06 PM	#3
jbondo Loyal Site Supportaxian Join Date: Sep 2013 Location: Texas Photos: Albums Posts: 503	Perhaps relevant: LensRentals.com - Sensor Stack Thickness: When Does It Matter? Some film-era lenses seem to do a lot better with thin, but it seems to depend a lot upon the specific lens formula. Some legacy lenses seem fine with the thicker ones.

07-25-2015, 05:02 PM	#4
pinholecam Pentaxian Join Date: Oct 2009 Location: North Photos: Gallery Posts: 4,706 Original Poster	Originally posted by osv wow, that is surprising! thx for the post. Indeed. I got quite a few SLR and RF wides to run through and will update the post when I get to them. Originally posted by jbondo Perhaps relevant: LensRentals.com - Sensor Stack Thickness: When Does It Matter? Some film-era lenses seem to do a lot better with thin, but it seems to depend a lot upon the specific lens formula. Some legacy lenses seem fine with the thicker ones. Yes, I'd think this is the case. Its a lens+camera interaction. Nothing is for sure with the mod. The modification just tries to get to what is possible on camera 'right'. Thats only half the equation.

07-28-2015, 03:35 PM	#5
pinholecam Pentaxian Join Date: Oct 2009 Location: North Photos: Gallery Posts: 4,706 Original Poster	I updated the review with samples of the CV25/4 color skopar and the Pentax K28/3.5. Strange journey for me indeed. I am nothing but awestruck by what the SLR lenses can get on the modded camera, esp with already very good lenses like the K28/3.5 The o/p (in terms of sharpness) reminds me so much of my DP1m. Practically, other than color representation in good light, I get the feeling that this camera all but makes the DP1m irrelevant for my usage (sadly). I should be able to get hold of a A7 (unmodded) towards the end of the week to compare more lenses again. Cheers!

07-30-2015, 04:05 PM	#6
pinholecam Pentaxian Join Date: Oct 2009 Location: North Photos: Gallery Posts: 4,706 Original Poster	Updated again with another more positive test with the CV15v1 and the CV35/1.4 Nokton

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