Upload & Sell: On
I have three older alt lenses in the shop getting fungus removed, and I just found another one. None of them had any that I could see when I bought them. None of my Canon EF lenses are currently affected, but I don't want to take any chances. Summer in Halifax is warm and humid.
I agree that desiccant is a solution, but it's not the only one, nor necessarily the best one. Just because you don't understand something doesn't make it bad, it's just something you don't understand.
As far as fit goes, it's not so important for the 500/4, as it's well sealed. As far as getting something bigger goes, it's certainly a good idea; however, as far as I can tell, it represents a significant step up in cost and power consumption, as it's going from 'home' to 'laboratory' technologies.
I was simply asking a question. Maybe somebody out there has the answer.