Camera unit uses a 23.6 x 15.7mm APS-C CMOS sensor; approximately 12.3-megapixel resolution
Features a 50 mm F2.5 macro lens; achieves strong imaging power all the way to the edge of the frame
8-group, 9-element configuration (aspherical lens: 1 element, two surfaces); low level of vignetting allows rich and genuine bokeh effects
Manual focus ring for use in macro photography makes highly-precise focusing possible
Compatible with the Ricoh GXR interchangeable unit camera system
This review is from: Ricoh A12 50mm f/2.5 Macro GR Lens with APS-C 12.3 MP CMOS SensorI've owned many macro lenses on DSLRs, and was excited to get this interchangeable lens/sensor combo for my GXR. I liked the novelty of the GXR, and purchased that with the 24-72mm lens/sensor option. The build on this unit is excellent. Ricoh did a great job of making this a closed system so no dust can get on the sensor. This is a mixed blessing because you also have no way of cleaning the sensor and the back of the lens like you would with a normal DSLR/macro lens combo. This is true of all lenses/sensors in this system. I've shot with this lens for about 2 weeks (fairly heavy use outside) and noticed small spots on my images due to dust on the sensor. I ended up returning this unit since it was within 30 days. Another problem is the cost - it will run you over $1000 for the Ricoh GXR and this lens, which means you have a lot of options if you wanted to spend that money investing in a DSLR and macro lens combo. Additionally, as an photographer I am sometimes torn over whether or not to swap lenses and sensors. Since this lens is CMOS, the pictures are obviously a lot better than the ones taken with the smaller sensored 24-72mm lens. This isn't a choice I'm used to making, since DSLRs you just have to decide to carry an extra lens. Overall, this unit is nicely built, but impossible to clean the lens or the sensor. I hope we would at least give us the self-cleaning sensors that vibrate from time to time to remove dust, but right now I can't recommend getting this if you already have a DSLR. For $700, you'd be much better off getting a macro lens separately.
This review is from: Ricoh A12 50mm f/2.5 Macro GR Lens with APS-C 12.3 MP CMOS SensorWell built, but pricey. You get what you pay for. This lens takes great photos. It has a matched sensor on it that is second to none.
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