Aetna Rokunar Mc Auto 28mm f2.8 Macro

kmurphy220 · 08-09-2015, 06:59 PM

Hey guys as reference in my Best Flea Market Find post

https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/301356-best...find-ever.html

I got this 28mm prime that is quite sharp from f/5.6 to f/11 but I was curious if anyone knows who manufactured such optical gold. the lens is an Aetna Rokunar Mc Auto 28mm f2.8 Macro. The build seems to be like a tank like most 28 primes I have seen are and it has almost a 360 degree focus throw. Any info would rock, thanks guys!!

**mgvh** · 08-10-2015, 07:27 PM

I also have an Aetna Rokunar MC Auto 28mm f2.8 in M42, but it is not a Macro. (It does gets to ~1:6.7 at ~8”=20cm.) Does yours indeed do macro?
Nice little lens that is best for me at 5.6-8 and is as good or better as a Sigma MiniWide 28mm 2.8 even at wider apertures.

kmurphy220 · 08-10-2015, 09:35 PM

Originally posted by mgvh

I also have an Aetna Rokunar MC Auto 28mm f2.8 in M42, but it is not a Macro. (It does gets to ~1:6.7 at ~8”=20cm.) Does yours indeed do macro?
Nice little lens that is best for me at 5.6-8 and is as good or better as a Sigma MiniWide 28mm 2.8 even at wider apertures.

My is in K mount and it is 1:4 at 20 centimeters. I have to get pretty damn close to it and the lens even has macro all over it. It has a little guide on it to show the ratios and everything. I would say it is almost pin sharp at f/8 but at f/11 it is byfar as sharp as I have ever seen a 28 prime. I would pit it against the 28mm f3.5 Pentax honestly. It is fairly sharp at all apertures and f/5.6 is acceptable but I find f/8 to be best. I just got a JC Penney 28 prime that has identical build quality to this literally to the T and I find it to be the worst lens I have ever used ever. But thats only after about 50-100 shots ranging from f/2.8-f/5.6. But this lens this lens is a little gem.

08-09-2015, 06:59 PM	#1
kmurphy220 Senior Member Join Date: Jun 2015 Photos: Albums Posts: 235	Aetna Rokunar Mc Auto 28mm f2.8 Macro Hey guys as reference in my Best Flea Market Find post https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/301356-best...find-ever.html I got this 28mm prime that is quite sharp from f/5.6 to f/11 but I was curious if anyone knows who manufactured such optical gold. the lens is an Aetna Rokunar Mc Auto 28mm f2.8 Macro. The build seems to be like a tank like most 28 primes I have seen are and it has almost a 360 degree focus throw. Any info would rock, thanks guys!!

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08-10-2015, 07:27 PM	#2
mgvh Site Supporter Join Date: Sep 2010 Location: MD Photos: Gallery \| Albums Posts: 1,029	I also have an Aetna Rokunar MC Auto 28mm f2.8 in M42, but it is not a Macro. (It does gets to ~1:6.7 at ~8”=20cm.) Does yours indeed do macro? Nice little lens that is best for me at 5.6-8 and is as good or better as a Sigma MiniWide 28mm 2.8 even at wider apertures.

08-10-2015, 09:35 PM	#3
kmurphy220 Senior Member Join Date: Jun 2015 Photos: Albums Posts: 235 Original Poster	Originally posted by mgvh I also have an Aetna Rokunar MC Auto 28mm f2.8 in M42, but it is not a Macro. (It does gets to ~1:6.7 at ~8”=20cm.) Does yours indeed do macro? Nice little lens that is best for me at 5.6-8 and is as good or better as a Sigma MiniWide 28mm 2.8 even at wider apertures. My is in K mount and it is 1:4 at 20 centimeters. I have to get pretty damn close to it and the lens even has macro all over it. It has a little guide on it to show the ratios and everything. I would say it is almost pin sharp at f/8 but at f/11 it is byfar as sharp as I have ever seen a 28 prime. I would pit it against the 28mm f3.5 Pentax honestly. It is fairly sharp at all apertures and f/5.6 is acceptable but I find f/8 to be best. I just got a JC Penney 28 prime that has identical build quality to this literally to the T and I find it to be the worst lens I have ever used ever. But thats only after about 50-100 shots ranging from f/2.8-f/5.6. But this lens this lens is a little gem.