One of the
Challenger stories,
High-grade viewfinder system, reveals a particularly difficult development -- the new pentaprism. From previous product stories, we gained some insight into its motivation. Now we hear from the designers. The pandemic hampered the development for a reason that might not be obvious immediately.
High-grade viewfinder system Designed to achieve high standards | Challengers | PENTAX K-3 Mark III | RICOH IMAGING "Development of high-refraction glass pentaprism"
"It was only after we began developing this new pentaprism, though, that we realized that we were faced with a formidable task, especially at the processing and assessment stages. High-refraction glass is a highly rigid and fragile material. It was extremely hard work to cut the prism’s edges at specific angles. Initially, we were planning to develop and process this pentaprism at our main pentaprism production factory in Vietnam, and started testing more than 200 production methods.
But things didn’t go well.
Of course, when we relocated our pentaprism production facility from Japan to Vietnam, this also involved transferring our expertise and craftsmanship. It’s usually the case in situations such as this that Japanese engineers visit the overseas factory and go through a detailed, repeated verification process with the local staff. Because of the coronavirus pandemic, however, it was impossible for us to make this trip. In the end,
we decided to set up a new facility in Japan where our engineering team could develop the technologies necessary to perfect the finishing process, the production step which demanded the largest amount of time. For instance, our engineers experimented with many different production methods and minute testing conditions, finding solutions through a trial-and-error approach in the end."
[my emphasis]
Incidentally, the physical characteristics of the prism suggest a plausible answer for the omission of GPS.
High-refraction glass is rigid and fragile > Need to protect it with a strong metal housing > Replace the conventional plastic prism cover with magnesium alloy > But the RF antennas would be shielded at the prism location > Move the antennas > Only have space for the wireless antennas > Could obtain location info from smartphone > Omit onboard GPS
Of course, there could be other reasons.
- Craig
Last edited by c.a.m; 04-01-2021 at 01:11 PM.
Reason: grammar