JanneM
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Senior Member
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Posts: 1,045
Re: Pentax 645D with 30 MP sensor, new D-FA 55/2.8 lens
JensR
wrote:
steephill
wrote:
jonny1976
wrote:
in addition what about the lens? how many lens is pentax producing
for medium format now?
How about these?
http://www.pentax.jp/english/imaging/filmcamera/lens/index645n2_list.html
Hi Steve!
I think Jonny was asking about actual production lenses?
I think few people outside Pentax (if any) really know which 645
lenses are actually produced and which are "remaining stock".
"In production" is a slippery concept when it comes to lenses - for Pentax as for any other maker (including Canon and other mass market companies). With the exception of kit lenses and perhaps a couple of other highly popular sellers, lenses are typically not in continuous production.
What manufacturers typically do is they schedule a production run of lens elements for a specific lens, enough for the projected demand until the next scheduled run. Barrels, fittings and electronics are ordered or produced separately, and as the elements are finished they get assembled into finished lenses. Once the run is done, they start on the next lens.
As I understand it, all the accessory parts, like barrels and so on are cheap to produce, but only when you make or order a lot at a time. Lens elements and assembly - grinding, polishing, gluing, fitting, measuring and so on - is where most of the cost lies, and you don't get a lot of scale benefit from running large batches.
So, as long as you have the accessory parts, even a very rare lens can still easily be "in production". You can run a few sets of elements now and again and always have a few units in stock. In fact, the long "special order only" tele lenses that Pentax (and other manufacturers) have, are probably just rare enough that they don't make units beforehand: instead, when somebody orders one, they schedule a set of elements to be produced and assembled into a lens.
A lens typically is "out of production" only when you have no more of the accessory fittings and it's too expensive to make another batch - when the molds used are worn out, for instance, and would need to be replaced. Or, as we have seen lately, when the lens materials can no longer be used and the lens would need to be reformulated.
So even a rare thing like the 600/4 (or the 67 800/5.6) are available for as long as they have the parts and can get the glass blanks needed to make another unit.