I like all the Retinas, but the IIa model is my favorite because of its easy handling and compactness.
To me, the camera seems ideally designed for candid and low-light
work. The fine f2 Xenon lens is very sharp, even at large apertures.
The Kodak designers packed a lot of functionality into a very small
space, so the construction is somewhat more complicated than earlier
models with its coupled range finder and auto shutter cocking.
I've done some shutter cleaning and range finder adjustment on mine, but
I've never attempted a full cleaning and adjustment on this one for
fear of getting in over my head. However, these cameras are not as hard
to work on as some others of the same era, and there are competent
repairmen around who can get the job done. A very large number of Ia
and IIa cameras were sold in the 1950's, so the cameras can be had for
very reasonable prices in spite of their high quality. The most
vulnerable parts are the frame advance spring and the shutter cocking
rack. Those parts are interchangeable between the Ia and IIa models,
and not terribly difficult to find.
In the unlikely event that I ever needed to choose just one camera to
keep and use from my collection, this one would likely be it.
Some sample photos from the IIa:
The
Retina IIa Manual is at the Butkus site.