panamawise

That's an intriguing suggestion, but my quest was limited in scope: I wanted to protect the front glass (UV) and fit - occasionally - a red filter. I was able to do so within a reasonable budget, but the "shade" allows you to use only one filter at a time. It's a bit cumbersome, but it works.

Hi Neil, this sounds like a great idea. I haven't tried it, but this is what I wrote earlier on within this thread: >>> Another interesting suggestion I got from friendly eBay seller HASSYWEST: Another option is to cut a gelatin(kodak wratten)filter and tape it over the rear element. That's an old school studio trick. <<<

Ha, ha... I've got to admit that I wouldn't have guessed the "shade" could be disassembled! Thanks again!

Well, I've reached the end of my quest. Luckily the 40mm I bought already came equipped with the curiously named 93/40 (40693) "shade" (must be Swedish humor), so I didn't have to purchase one. Thanks to this forum, I discovered that it's made of two parts, which is not immediately obvious. And now I've gotten my two filters (UV and Red) I understand why they are expensive (they are really large!) and how they actually "drop" in between the two slim rings which is not fantastically practical but works. I observe those filters are not threaded. I can only use one filter at a time, of course. You can easily purchase one red filter for about $200 if you don't mind about the description ("very badly scratched") but that's what I ended up paying for my two filters (from two sellers in Japan: one excellent while the other (red one) never bothered to reply to my inquiries. His description was rather fanciful: Hasselblad Ø 93/40 Lens Filter Holder Ring w. red Filter BandW 090 5 x MC | eBay As I correctly guessed, he was actually selling the drop in red filter I wanted (in mint condition, as well as the UV) plus one half of the "shade". I did a lot of exploring on eBay and had a hard time getting the sellers to explain if their filters were threaded or not. (I understand the "shade" would have accepted 93 mm threaded filters). OK, so it's a happy ending. Thanks for your help.

Thank you again, Ed. I'm afraid I'm stuck at ambient temperature (30 C) since my cabinet only works controlling humidity. I am checking with an independent sensor and it's doing a good job. I've set the humidity at 45%.

Thank you again Ed for clarifying the difference between Dew Point and Relative Humidity, thank you Gary for sharing your personal experience, and thank you Bill for taking the trouble of checking out the cabinet specs. I won't worry about the temperature (life in the Tropics) and focus on the ideal relative humidity setting. I suspect that by maintaining the Zeiss lenses below 50% I should be able to prevent fungus. Since I also keep my 503 CW Hasselblad body in the cabinet, I wonder if there's a risk of going too low, thus affecting lubrication for example.

Thank you Ed, the cabinet instructions indicate 40%-50% for optical equipment. Extreme desiccation might be a problem for the camera itself which must stay correctly lubricated. As for the temperature, this cabinet does not control it, so it's rather uniform albeit rather high (around 30 C = 86 F). You're right, keeping it refrigerated could very likely be counterproductive. Right now, I set the cabinet at 45% for the time being.

Hi, I just got a FORSPARK 50L dry cabinet to store my Hasselblad 503CW and four lenses, and I'd like to hear about your suggestions. I would think something within 35% and 45% should be good, but I don't want to make a costly mistake. Depending on your geographic location, feel free to mock me, reminding me that Zeiss glass should be used, not stored... In the Republic of Panama, where I live, humidity rarely falls under 80% (and the annual average is 86%). My Nikon lenses once started to grow fungus, I sent them to Nikon USA, but two years later, the issue recurred.

The long wait is over and I've finally received my 40mm Distagon... A superb piece, in pristine condition. The top glass is rather large and exposed, so I've ordered a "haze" (UV) filter for protection. Now I'm holding the lens in my hands, I understand what is referred to as "petals". The 93/40 "shade" opened easily. I have actually ordered two "drop-in" filters (UV 51411) & (RED 51403). I love the Richard Nordin Compendium, which is an indispensable source! With eBay, it's always a gamble, but I tried to hedge my bets as well as possible. I bought the (allegedly near mint) UV at the sweet price of $90 (free shipping) and the red one at $143 (including shipping) I could easily have paid double that... there's a few available from England over $235 and one of them is attractively described as "very badly scratched". Since my lens was already provided with the shade (which is expensive) I "only" spent $233 on filters... (hey, those filters are huge!). I didn't want to go over $300. Other alternative I explored was from LEE filters. After discussing the possibility of vignetting, this is what John Adler wrote: "I have to apologize. It's been a long time since I've answered a question about this lens, and I remembered incorrectly. The ring I recommended will vignette. You can get an 86mm ring, which vignettes just a little: LEE Filters86mm Adapter Ring for Foundation Kit To use this you unscrew the outer ring. Another option is to use a special filter holder we make: LEE Filters100mm Push-On Filter Holder You'll get no vignetting with this holder. It doesn't attach with an adapter ring. Instead, it has a built-in collar that tightens down around the front filter holder on your lens". Another interesting suggestion I got from friendly eBay seller HASSYWEST: Another option is to cut a gelatin(kodak wratten)filter and tape it over the rear element. That's an old school studio trick. Thank you again, Tom and Ed. Here are some quick photos of my lens:

Thank you again Ed, that's an interesting photo - showing a petal-like structure I hadn't seen previously. I read that most people were not aware the shade could be disassembled and many were unable to do so. I hope I manage to do it and will keep you posted.

Thank you again Ed, I suspect I'll get a better understanding when I finally receive the lens and the intriguing "shade" (There is no postal service in my country of residence, so I need to be patient). I have been exploring a few avenues and I'll post the final results. Your kind assistance is well appreciated.

Point taken. Please forgive this brief moment of impatience. I regretted this remark as soon as I posted it but couldn't find a way to edit it. While photography has long been my passion, I am new to medium format and, obviously to this impressive forum.it should have occurred to me that there are comparatively few CF40mm owners.

Thank you Ed! I get your point... although I'm using UV filters on my three other CF lenses (grandkids!). My 40mm CF is still in the mail and until I get it I won't understand how its accompanying 93/40 (40693) lens "shade" works. At this stage in my research, I would assume that I could purchase a red (51403) drop-in filter and that I could insert it inside the shade. However it seems that some or those filters are drop-in while some are threaded, so I'm still confused

Hmmm... I see you guys are very busy, or not as knowledgeable as I initially thought. Can anyone tell me if I could use TWO filters at the same time on the 93/40 (40693) lens shade? I would like to use a Hasselblad 93 drop in UV filter permanently, AND add a threaded B+H 93mm red filter. Thanks in advance!