Rokkor fever... not another 58 thread!

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Archive 2009 · Rokkor fever... not another 58 thread!

racevedo
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p.2 #1 · Rokkor fever... not another 58 thread!

Actually, the rear retaining rings were taken down very slightly only on the leading edge where it might hit while still providing protection for the glass. Unmodified though, it did not clear on Jim's 5d (unshaved mirror) and that's when he asked me if I'd like to try for additional clearance since I had a 1-series. Fortunately for my combo, all is well in infinity-mirror land!

I'm not very familiar with how the typical wide-angle rear conversion method is done, but compared to my 58/1.2, there are distinct refinements. Makes me want to update the 58, haha!

Dec 11, 2009 at 04:13 AM

racevedo
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p.2 #2 · Rokkor fever... not another 58 thread!

john lewis wrote:
So how does the 21mm fare

Is is a gem like other the 58mm

pictures, and more pictures

I will definitely post some shots once I'm able to take it out for a spin!

Dec 11, 2009 at 04:17 AM

racevedo
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p.2 #3 · Rokkor fever... not another 58 thread!

1Ds3, Rokkor 21/2.8 @ f8, 1/125th, ISO100, infinity focus, tripod low to ground about 1.5'

Dec 14, 2009 at 07:54 PM

Ed Sawyer
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p.2 #4 · Rokkor fever... not another 58 thread!

Looks nice! Thanks for sharing! Definitely interested to see more from this one,

-Ed

Dec 15, 2009 at 04:23 AM

racevedo
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p.2 #5 · Rokkor fever... not another 58 thread!

Here's an indoor brick wall / awning / long exposure test shot, haha

Dec 16, 2009 at 03:31 AM

Ed Sawyer
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p.2 #6 · Rokkor fever... not another 58 thread!

Looks good. I forget, do you have an Oly 21 to compare with?

-Ed

Dec 16, 2009 at 03:04 PM

racevedo
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p.2 #7 · Rokkor fever... not another 58 thread!

Yep, here's the OM 21/2 at f8, 1/500th, ISO100.

The Rokkor is warmer. Both files were processed equally, but I needed to adjust color temp, exposure and eyeballed both images to match as best I could. I started off by applying Landscape and Daylight WB to the zuiko as the baseline and tweaked slightly from there. The Rokkor has better foreground corners, the zuiko is stronger in the center from edge to edge and holds slightly more detail all the way to infinity. At F8, it still has darkish corners, but it progressively goes away stopping down further. It's true - do not be afraid to use the Oly 21/2 down to F16, that's when it starts to catch up with the Rokkor in the foreground corners. Lastly, I've confirmed what I read previously about the Rokkor being a little longer than 21mm. The Oly 21/2 is a tad bit wider at the edges. Toggle both images back and forth quickly. The difference is pretty obvious and kinda makes the Zuiko look distorted as a result from being that much wider, haha.

Dec 16, 2009 at 03:31 PM

racevedo
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p.2 #8 · Rokkor fever... not another 58 thread!

Just got in my latest conversion from Jim and haven't been able to shoot it on my other bodies yet, but here's a quick test shot, 1/80th, ISO1600 on the T1i. CS3 Exif reports f/1.8 (tagotech chip does not allow intermediate values), 1/85th, but that's wide open on the MC Rokkor 85/1.7 @ 1/80th on the CR2.

The new EF mount looks exactly like the one on the 21mm, this latest generation of Jim's is really sweet.

Jan 12, 2010 at 08:13 AM

apras
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p.2 #9 · Rokkor fever... not another 58 thread!

very nice lens. i wonder if the sony/minolta 20mm 2.8 has the same design

Jan 12, 2010 at 08:39 AM

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