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486 IR cut filter for 43mm


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The standard B+W UV/IR cut filter (486) will screw into the front of the older 50 Summilux and the recent Special Edition LHSA summilux that was made for th MP 3. However, the auxiliary lens hood will not clear the filter.

 

The original 43mm Leitz filers had a 43.6 mm OD, whereas the current B+W filters have an OD of about 46mm.

 

So the current B+W 43mm filters won't work on those lenses.

 

The only way to deal with this is to obtain both a current B+W 43mm 486 and an early Leitz filter (any type and color) that was made for the summilux. You then will need to get someone who works with optics to remove the UV IR glass from the 486 (it's a press fit, so this usually involves damaging the mount of the 486). This is then inserted in place of the glass of the original filter, which is easier to remove as there is a threaded retaining ring. The earlier filter was a Leitz E43, but you have to make sure it is one of the earlier models, as there are some later ones that do not allow the use of the hood.

 

I have done this with three filters so far (all for personal use... sorry) . . . works great.

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The standard B+W UV/IR cut filter (486) will screw into the front of the older 50 Summilux and the recent Special Edition LHSA summilux that was made for th MP 3. However, the auxiliary lens hood will not clear the filter.

 

The original 43mm Leitz filers had a 43.6 mm OD, whereas the current B+W filters have an OD of about 46mm.

 

So the current B+W 43mm filters won't work on those lenses.

 

The only way to deal with this is to obtain both a current B+W 43mm 486 and an early Leitz filter (any type and color) that was made for the summilux. You then will need to get someone who works with optics to remove the UV IR glass from the 486 (it's a press fit, so this usually involves damaging the mount of the 486). This is then inserted in place of the glass of the original filter, which is easier to remove as there is a threaded retaining ring. The earlier filter was a Leitz E43, but you have to make sure it is one of the earlier models, as there are some later ones that do not allow the use of the hood.

 

I have done this with three filters so far (all for personal use... sorry) . . . works great.

 

Thanks for the heads up. Just ordered the B+W from Popflash for my LHSA Lux, didn't realize this complication. Guess will have to get an old Leica E43 filter and do as you suggested. Does the B+W glass fit right into the old Leitz ring?

 

Alan

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Yes, the glass from the 486 should fit right into the old mount after the retaining ring is removed (you will need an optical spanner wrench for this), but make sure you orient the front and back of the new glass the same way ias on the 486. Although the filter will work no matter how it is oriented, the 486 has the harder MRC coating facing away from the lens, which is where you want it.

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Yes, the glass from the 486 should fit right into the old mount after the retaining ring is removed (you will need an optical spanner wrench for this), but make sure you orient the front and back of the new glass the same way ias on the 486. Although the filter will work no matter how it is oriented, the 486 has the harder MRC coating facing away from the lens, which is where you want it.

 

Ed;

Really appreciate your advise. Two more questions:

 

How do you take the glass out from the B+W mount without damaging the glass?

Was the old 43mm Summilux filter ever available in black? (I have the black paint Lux 50)

 

Thanks again,

Alan

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As to your first question, I don't know. Don Goldberg did mine.

 

Regarding your second question, yes there were some E43 filters in black, but they are rare. Usually if you find a 43mm in black it is not the slim version and the shade won't work. I suggest making up a chrome E43 for the time being and then just keep your eyes open for a black slim version. Unfortunately, unless you get one from someone who has an older 50 summilux with the external hood, whoever has one might not not know whether it is the slim version and whether the shade will work or not.

 

Good luck.

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....................The only way to deal with this is to obtain both a current B+W 43mm 486 and an early Leitz filter (any type and color) that was made for the summilux. You then will need to get someone who works with optics to remove the UV IR glass from the 486 (it's a press fit, so this usually involves damaging the mount of the 486). This is then inserted in place of the glass of the original filter, which is easier to remove as there is a threaded retaining ring. The earlier filter was a Leitz E43, but you have to make sure it is one of the earlier models, as there are some later ones that do not allow the use of the hood.

 

I have done this with three filters so far (all for personal use... sorry) . . . works great.

 

Although the retaining ring of the B+W UV-IR filter looks as if it's a press fit I'm not so sure that it is. I know that on the larger 486 filters I have, the retaining ring screws in, and looks similar to that of the 43mm filter. I had some filters where the glass was assembled with the IR coating on the wrong side, so I reversed the glass in the mount. Here's how I did it.

 

You need a small sheet of leather that has a rough unglazed side or a sheet of rubber and a hard flat surface to work on. Place the leather rough side up or the sheet of rubber on the flat surface. Press the back of the filter onto the rubber or leather and while maintaining the pressure turn the filter anti clockwise. The retaining ring should unscrew and you can remove the glass. Use the same proceedure to screw a ring back if needed.

 

If you can't get the ring to unscrew place the filter front down on a warm stove until it's almost too hot to hold. Now quickly try to unscrew the retaining ring. You have to be quick because you are relying on the differential expansion between the hot holder and cooler ring to loosen the ring. There is a small risk you may crack the filter doing this, so be careful not to overheat.

 

Bob.

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