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09-03-2016, 11:06 AM   #1
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XR Rikenon 1:2.8 45mm

Can't find much information about this little lens, but it's a full frame K mount lens with a plastic barrel and metal mount. It's a "Pancake" style design (similar to the Pentax M 40mm f2.8) with a 52mm filter thread, very compact and lightweight.

Here's a few photos of it, then with it:





This one's at f5.6:


And at f2.8:


And finally with a 20mm Extension tube:




09-03-2016, 12:07 PM   #2
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Several listed on eBay from Japan right now, though I think the price is a bit high. I wouldn't pay $120 for this lens or the Pentax M 40/2.8...One of the listings is $230/obo.
09-03-2016, 12:34 PM   #3
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It's been a rare find, your copy looks great! I've used their 50s and a poor 55 f/2.2 but not the 45.
09-03-2016, 12:41 PM   #4
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QuoteOriginally posted by jimr-pdx Quote
It's been a rare find, your copy looks great! I've used their 50s and a poor 55 f/2.2 but not the 45.
That 55 f/2.2 is dreadful - I kind of like mine for occasional "artsy" shots, but it really is quite poor. The 50 f/2 models are great, though, and I'm sure the faster ones are better still. I'd enjoy playing around with this 45... an interesting focal length and, as you say, quite rare

09-03-2016, 01:28 PM   #5
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QuoteOriginally posted by BigMackCam Quote
That 55 f/2.2 is dreadful - I kind of like mine for occasional "artsy" shots, but it really is quite poor. The 50 f/2 models are great, though, and I'm sure the faster ones are better still. I'd enjoy playing around with this 45... an interesting focal length and, as you say, quite rare
I had an XR Rikenon 55/1.2 for a while - that lens was top notch, in the same class as the Pentax A 50/1.2 IMO - this 45/2.8 doesn't have the same build quality although the optics certainly appear good, but I won't hang on to it simply because of my FA 43/1.9
09-28-2018, 01:16 AM   #6
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I don't think the 55mm f/2.2 is "poor" or "dreadful", come on, don't be so strict!
In digital time, considering the choice of modern objectives, this lens can be seen only as a specialty lens.
Kind of poor man's Trioplan.
I didn't use it very much, just tested. I got a few nice bubble bokeh pictures... which is the only reason to use such kind of lens.

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