Nokton 50mm f/1.1 B+W 58mm Filter Problem!!

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D&A

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Hi All,

I didn't want to put this issue into the "image" thread for this lens, since it's a technical problem I've just run into and it has me scratching my head.

I just screwed on a brand new 58mm B+W UVIR 486 cut filter onto the front of the Nokton 50mm f1.1. The B+W filter is the regular NOT slim type (I made sure). When I screw in the hood into the filter...it takes hold and starts screwing in but it never fully reaches a point where it FULLY tightens...just round and round...it sort of half way screwed in but that's about it. Here's the kicker!!! The hood will screw into any other 58mm I tried..all brands, and I tried many (don't have any other 58mm B+W filters though.) The hood will also screw into any step rings. Now I tried the converse....I tried screwing in a couple of other 58mm hood into the B+W as well as step rings into it's front threads....and everything screws in fine! I can't figure out what gives? Defective filter threads...doesn't seem like it. Defective hood threads..also doesn't seem like it. Incompatibility between these specific two items? Hmmm?

Only thing I can see different with the B+W front filter threads as opposed to other brand 58mm front filter threads...are there are less "turns" or less threads on the B+W one.

Has anyone run into this issue? Has anyone tried specifically a B+W 58mm UVIR 486 filter with the new hood from Voigtlander 50mm f1.1 lens?

For the time being, since the lens cap threads seem to be threaded for filters, I screwed the filter into those threads and don't think vignetting will be a problem due to the M8 1.3x crop factor. Thanks for any suggestions or insight!

Dave (D&A)
 
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I have a B+W 58ES KR1.5 1.1x filter screwed into the Nokton 1.1 with no problem. It's not a new filter - i've had it for years, though.

The hood goes into that filter without any problem, as well.
 
Same thing happens with the Nokton 50/1.5 and the hood. When I screw in the hood on top of the filter, it does exactly what you're describing. Must be a Voigtlander thing. If anyone knows how to affix securely, I'd love to hear it.
 
Thanks so far for the responses. Interesting that you both experience something completely different. I tried a B+W 52mm UVIR filter with the Nokton 50mm f1.5 lens adn absolutely no problem...but with a B+W 58mm UVIR filter and the Nokton 50mm f1.1 hood..it's a no-go...and it just partially goes on but never tightens.

What I would like to know if anyone else has a regualar B+W UV IR 58mm filter and has it successfully work with the hood from the Nokton 50mm f1.1 lens...or conversly, someone else has the same issue with the same combination filter and hood.

Thanks!

Dave (D&A)
 
Hi All....Just a thought.....Maybe the B+W 58mm UVIR filters are all of a new style and the threads on the front of the filter ring are cut different than older regular B+W filters....and somehow the 50mm f1.1 hood doesn't interface with them properly...just a thought.

Dave (D&A)
 
D&A said:
Hi All,


I just screwed on a brand new 58mm B+W UVIR 486 cut filter onto the front of the Nokton 50mm f1.1. The B+W filter is the regular NOT slim type (I made sure). When I screw in the hood into the filter...it takes hold and starts screwing in but it never fully reaches a point where it FULLY tightens...just round and round...it sort of half way screwed in but that's about it.
Click to expand...

Same thing is happening to my Nokton f1.1 and B+W MRC UV-haze filter. You are not alone.

Can anyone suggest an aftermarket lens hood and cap?

I found some on Ebay. Price is low, but I am not sure if they will block the viewfinder or not.

http://cgi.ebay.com/New-Metal-Wide-Angle-58mm-Screw-in-Lens-Hood-Cap_W0QQitemZ200317063033QQcmdZViewItemQQptZLens_Accessories?hash=item2ea3d3cf79&_trksid=p3286.c0.m14&_trkparms=65%3A12|66%3A4|39%3A1|72%3A1205|293%3A1|294%3A200

http://cgi.ebay.com/58mm-58-Lens-Hood-Cap-for-Sony-Canon-Panasonic-Mini-DV_W0QQitemZ330341311724QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item4ce9e064ec&_trksid=p3286.c0.m14&_trkparms=65%3A12|66%3A4|39%3A1|72%3A1205|293%3A1|294%3A200
 
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For the time being I have screwed the filter into the threads inside the hood but it's not recommended to do this. Even the instructions mention this due to possible vignetting. Of course on a leica M8 with 1.3x crop factor this may not matter. Still with putting the filter inside the hood....there is less covage by the hood and a larger iunterface between the filter and lens front element...possibly giving rise to the occasional flair.
 
Today I tried two B+W 58mm filters on a 50/1.1 Nokton. Filters were mounted on the lens, and then the lens hood screwed into the filter.

The lens hood tightened up on the IRC filter, contrary to the OP's experience. However the lens hood just spun and would not tighten up on the UV filter. The same hood was tried on both filters.

To me this suggests manufacturing inconsistencies on B+W 58mm filters.

Stephen
 
Hi Stephen,

I'm the original poster. Thanks for trying these filters with your hood. Today I tried a brand new Hoya filter I just opened up and the hood just spinned round and round without tightening. Unless B+W using the same filter rings that Hoya uses....this issue may go beyond just B+W filters. One thing I did notice was the similarity of the B+W and Hoya filter in that each front filter thread in these two filters had what seemed only approx. two "turns" of threads counting top to bottom (if that makes ense)...whereas the other 58mm filters that did work with the hood properly (like a tiffen filter I tried)...has three "turns" of threads.

It may be that older B+W filters had more front filter threads than current B+W filters...so it's hard to say what if any changes can be made to recetify this problem. Thanks again.

Dave (D&A)
 
Look at the thread pitch on the front of the filters and on the hood. The "old" thread pitch was 0.5mm, which is also the thread pitch on E43 50mm Summilux lenses, and that thread pitch causes a lot of problems. Most modern thread pitches on both lenses and filters are 0.75mm. You can see the difference with the naked eye.
 
Hi Peter,

I'm aware of the different thread pitches, especially for some of Leica lenses taking 39 & 43mm (using .5) whereas non Leica filters in this size is .75 . This doesn't appear to be the case. If you read my entire 1st post (on top)..you'll see why (as each respective item (hood and B+W filtyer) work just fine with other .75 pitch filters adn step rings when screwed into each. Pitch of threads appear to be the same...seems it's due to other reasons. Thanks again.

Dave (D&A)
 
I use B+W filter on the hood and hood+filter on the lens. I haven't seen any effect using this way, but then, my expectation may be lower than others... Good enough for now until I see really big effect on images...
 
the b+w 58mm filter fits fine on the nokton1.1 (without the hood).

if you want the hood, you should screw the b+w filter onto the hood instead, then screw the hood onto the lens.

this avoids the too much stacking in front of the lens. not sure if this was a design fawl, or a stroke of brilliance by the designers!! =)
 
D&A said:
Hi Peter,

I'm aware of the different thread pitches, especially for some of Leica lenses taking 39 & 43mm (using .5) whereas non Leica filters in this size is .75 . This doesn't appear to be the case. If you read my entire 1st post (on top)..you'll see why (as each respective item (hood and B+W filtyer) work just fine with other .75 pitch filters adn step rings when screwed into each. Pitch of threads appear to be the same...seems it's due to other reasons. Thanks again.

Dave (D&A)
Click to expand...
Dave if not the pitch, I have had B+W filters that bind in a lens and filters that spin in a lens. I've had two B+W filters, identical, one of which fitted and the other spun in the same lens. The one that spun fitted another lens of the same size perfectly. I've no explanation for it, except that tolerances may have been involved. In every case that I had a problem with B+W filters, no matter what thread pitch, Hoya filters fit the lens perfectly. For example a 0.75mm Hoya would screw into a 0.5mm pitched lens. No explanation for that either.
 
it does the same thing with both a b+w ND and a hoya 80b filter so i suspect the hood. i've swapped it off and put on my heliopan (Leicagoodies steps) so it looks just like my 35
 
For M8 and RD1 users, you probably want a narrower hood anyways, for less VF blockage. Check out Bo Lorentzen (sp?) forthcoming M8 specific hoods.

Peter - are you sure about the lux hood threads? I have a '66 43 lux that takes the b+w 43mm uv/ir filter, + Nokton 40/1.4 43mm hood perfectly.
 
Yes I'm sure. Even the new E43 Summilux ASPH that was sold with the MP3 has a 0.5mm thread pitch. Don't get me wrong, I've mounted a B+W UV filter on a pre-ASPH v.2 and it fitted perfectly, someone told me that B+W still issues filters in certain sizes with the "old" pitch. What those sizes are I don't know. But I've had weird problems with fit and B+W filters. A nuisance because I really like them...
 
Hi b&w,

Just a quick comment. There are lots of work arounds, but even the instructions that came with the lens says NOt to screw the filter inside the hood but put it directly on the lens! They went on to say they were cautious about vignetting with full frame. Still, screwing the filter inside the hood works..except after a while, you'll fine it's near impossible to unscrew in the field with just your hands. Anyhow, it will work out soioner or later. Thanks!

Dave (D&A)
 
perhaps their are not enough threads in front of the filter glass. Sounds like the alloy B+W filter or one of the knockoffs. I had the same issue with filter stacking and I ended up getting a real brass B+W MRC without issue.
 
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