Hasselblad 100mm Planar questions

If it says "Synchro Compur" on your lens (and it will), it will take bayonet 50 filters.
You have the correct data sheet.

The "50" in bayonet 50 is not the outer diameter of the filter mount, nor thread size, but the size (approximately) of the glass in the filter. Zeiss calls this size "Bayonet 58", after the size of the bayonet mount. So that's about the size filter you should look for.

Heliopan has an adapter in their program, but only to 55 mm filters (art.no. 332 Bay 50 H -> 55 x 0.75).
I'm sure other manufacturers, like B+W, will have something too.

Hasselblad Bayonet 50 filters are plentiful, and cheap enough to consider them instead of adapters.

 

E.g. Hama sells/sold a B50->52mm adapter, which lets you use normal 52mm filters. There are other brands including no-names too and none of them costs a fortune. They also let you use the standard Hasselblad lens shade, i.e. the outer bayonet isn't blocked by the adapter. (You do plan to use the shade don't you? It would be a pity of having the sharpest Hasselblad lens ever made (That should read "affordable Hasselblad lens...") ruined by flare.
But as Q.G. says, there are lots of B50 filters around. (Labeled "Hasselblad ... Made in Germany" so they should be of decent quality.) Try to find a stack of filters, which would be the cheapest way of getting all the filters you need and then some...

//Björn

 

52 mm filters will not work on all bayonet 50 lenses, being really a bit too small in diameter.

 

You can buy Bay 50 filters so cheap, it's not hardly worth the effort to move to another size. How many are you really going to use?

Mike

 

I've found the best source for step-up and -down adapters - and really filters themselves, to be Tiffen. Google them and give them a try.

 

Agree with this, I'd go to 55 or 58mm.

 

I've used a B50->52 converter with success (i.e. without any vignetting) on a Planar 80mm, so it should be fine on a 100mm. The advantage is that the lens shade will fit on the outside bayonet without problems, which wouldn't be the case with a bigger filter.
But again, it didn't take long before I found a stack with all the b/w filters I could use plus a couple of Softars and Proxars, after which the choice was easy...

//Björn

 

The Hasselblad bayonet 50 filters are bigger filters (58 mm mount), and the hood fits very nicely.

 

As the Hasselblad filters are bayonet mounted, they do not stick like the common filter mount sometimes do, and, like Q. G. said, "...the hood fits very nicely..."!
And, if you find some Proxars, you can mount them between the lens and the filter and do some close up work, AND the hood...

Good luck,

Philippe

 

Actually, on the T*50 mm, it is a series VIII filter, hold in place by the retaining ring or the original screw in hood you need, but that's the theory...

Philippe

 

The mount is indeed a Series VIII, which Hasselblad called Series 63.
The thread is close to metric 67, but not quite the same. That's why it's tight.

There is a Hasselblad adapter ring, allowing use of Series 63 filters on bayonet 50 lenses. And one allowing use of Series 63 filters on bayonet 60 lenses. No other. No adapter to fit other size/mount filters on Series VIII/63 mount lenses.
The "adapter ring" Zeiss mentions is the retaining ring Philippe mentioned.

 

It is. The filter should sit tight enough not to need a click stop.
Though lens caps will sometimes fit tighter to the filter than the filter does to the lens ...

 

Mind you: too much 'build-up' in front of the 50 mm lens will lead to vignetting pretty fast.

 

Real fast, I've learned the hard way. One B&W 67mm filter and the Hassy shade cause me grief.

I use the drop in filters with the shade, no problem.

Mike