IR/UV-cut filter for Biogon

[Knorp]

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Hi there,

I'm looking for an IR/UV-cut filter for my Zeiss Biogon T* 2/35 ZM.

According to the documentation the lens will take an M43x0,75 filter

But will a Leica E43 filter fit ?

 

Any recommendation ?

Thank you.

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[wlaidlaw]

Hi there,

I'm looking for an IR/UV-cut filter for my Zeiss Biogon T* 2/35 ZM.

According to the documentation the lens will take an M43x0,75 filter

But will a Leica E43 filter fit ?

 

Any recommendation ?

Thank you.

 

Bart,

 

In my experience the answer is no. It screws in about half a turn and then jams. The outside thread diameter is 42.83mm against the 42.77/78mm of B+W or Schneider filters. Nobody has said yet if this was an error or a deliberate act. Also the Leica is available in silver only. I would stick to B+W for the moment.

 

Wilson

[doubice]

Hi there,

I'm looking for an IR/UV-cut filter for my Zeiss Biogon T* 2/35 ZM.

According to the documentation the lens will take an M43x0,75 filter

But will a Leica E43 filter fit ?

 

Thank you.

 

Yes, any 43mm filter will fit your Biogon. The E in E43 stands for 'Einschraub' in German; translation - Screw in. The 0,75 refers to the pitch of the thread and is standard for all 43mm filters.

 

Best,

 

Jan

 

Edit: Maybe not...., after reading Wilson's first hand experience. The Leica filter does indeed have a 0.75 pitch; why it does not screw in all the way is a mystery....

[Knorp]

Jan & Wilson, thank you both for replying.

So what you are saying is that any E43 should fit but it's likely the Leica will jam.

Mmm considering the price difference I better put my money on the B+W.

Of course there is a slight compatibility risk between the M8 software and the B+W filter. Time will tell.

All the best.

[wlaidlaw]

Jan & Wilson, thank you both for replying.

So what you are saying is that any E43 should fit but it's likely the Leica will jam.

Mmm considering the price difference I better put my money on the B+W.

Of course there is a slight compatibility risk between the M8 software and the B+W filter. Time will tell.

All the best.

 

Bart,

 

The B+W filter can give a very slight green cast or fractionally over saturated greens on the CZ35 but it is marginal. It is nothing you can't easily correct on C1 if you are using 100% DNG's like me or PS for JPEG's. I have used both B+W and Leica filters on 46mm sizes and although there is a difference, it is tiny. 1.107 seems to minimise this even more than 1.102.

 

Wilson

[gurtch]

Jan & Wilson, thank you both for replying.

So what you are saying is that any E43 should fit but it's likely the Leica will jam.

Mmm considering the price difference I better put my money on the B+W.

Of course there is a slight compatibility risk between the M8 software and the B+W filter. Time will tell.

All the best.

 

I have both. The Leica filter screws in about 1 or 1.5 turns then stops. I thought it was a faulty filter. I use it anyway, and the ZM hood DOES still fit.

Dave G.

[Knorp]

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I have both. The Leica filter screws in about 1 or 1.5 turns then stops. I thought it was a faulty filter. I use it anyway, and the ZM hood DOES still fit.

Dave G.

 

Hi Dave, sorry about your Leica filter, but I take it that the B+W is all right then.

All the best.

[wlaidlaw]

Bart,

 

B+W or Schneider 43mm filters screw in fully and very easily into the Biogon 35. A Leica dealer told me he was thinking of sending back all his 43mm filters as they are very tight in the old Summicrons as well. I am guessing this was a mistake in setting up the CNC thread cutting tool - pretty basic error getting the thread diameter wrong by 0.05 mm. The pitch seems correct as far as I could see under a loupe at 0.75mm.

 

Wilson

[carstenw]

Bart, in my experience, the B+W on the Leica 35/2 Asph doesn't have problems, whereas the larger front element of the 35/1.4 Asph *sometimes*, but not often, has problems with cyan drifting. I think the 35s are just on the edge of where you need the Leica filter.

[wlaidlaw]

Bart, in my experience, the B+W on the Leica 35/2 Asph doesn't have problems, whereas the larger front element of the 35/1.4 Asph *sometimes*, but not often, has problems with cyan drifting. I think the 35s are just on the edge of where you need the Leica filter.

 

Carsten,

 

Unless of course you are taking a photo at a cocktail party and all the ladies are wearing "little magenta numbers". Whatever they make ladies black cocktail frocks out of seems to be just the very worst for magenta shift. Maybe they are hot numbers giving off lots of IR.

 

You also really need an IR filter for flash or the exposures are inaccurate even with the B35. I don't like this as you can easily get flare off other lights in the room and get pink circles on your image from the back of the filter. What is really needed is an IR filter to fit on the flash.

 

Wilson

[carstenw]

Wilson, I don't mean using a filter or not, but rather, for the 35/2, and 50+ lenses, use B+W, but for 35/1.4 and 28 and lower, use Leica. There is a difference, but only the wider lenses will make it visible.

[wlaidlaw]

Wilson, I don't mean using a filter or not, but rather, for the 35/2, and 50+ lenses, use B+W, but for 35/1.4 and 28 and lower, use Leica. There is a difference, but only the wider lenses will make it visible.

 

Sorry Carsten - read it wrongly. I would like to use a Leica filter for the CV35/1.2 but no option. I have a slightly lowered green icc C1 profile I use for my two 35 mm lenses, both of which have B+W filters on them. That is the only difference I can see. The B+W may remove more IR but I can't detect that.

 

Wilson

[Peter Branch]

All this reminds me of the story regarding the attempts to standardize the threads on microscope objectives and eyepieces so that they were interchangeable. I understand this was sometime in the 1930's. The story goes that Leitz and Zeiss, the leading manufactures at the time, duly agreed on a "new" standard and further agreed that in the public interest they would abide by it.

 

The problem was that all specifications of this type have tolerances and the two companies, knowing full well that they could manufacture with much greater accuracy than the tolerances agreed, declined to raise this point with the authorities. Indeed they argued that the proposed tolerances were, if anything, too stringent.

 

The two companies resumed manufacture with all their products meeting the new standard but for some reason Zeiss operated at one end of the tolerance and Leitz at the other. The products were still not interchangeable.

[Knorp]

Bart, in my experience, the B+W on the Leica 35/2 Asph doesn't have problems, whereas the larger front element of the 35/1.4 Asph *sometimes*, but not often, has problems with cyan drifting. I think the 35s are just on the edge of where you need the Leica filter.

 

Thank you Carsten, I'll go for the B+W, trust it will be all right and a slight cyan drift is preferable over magenta cast.

All the best.

[delander †]

The leica E43 filter wont fit because the pitch is 0.5mm. This information is on Erwin Puts site and has been discussed here before a few weeks ago.

 

Jeff

[jlm]

both Leica and Zeiss use 0.5mm pitch for their smaller diameter lenses and 0,75 pitch for their larger. Unfortunately, they do not agree on where to differentiate small from large. good luck on where the filter makers differentiate their pitch

[wlaidlaw]

both Leica and Zeiss use 0.5mm pitch for their smaller diameter lenses and 0,75 pitch for their larger. Unfortunately, they do not agree on where to differentiate small from large. good luck on where the filter makers differentiate their pitch

 

Then it is high time Leica stopped hiding their head in the sand, recognised and learnt to live with the fact that M8 users ARE going to use other lenses than Leica and provided a suitable range of the UV/IR cut filters to fit the more commonly used non-Leica M fit lenses, as a service to M8 customers. After all they made the decision not to put an IR filter on the sensor.

 

I am not expecting them to make a 26.5 x 0.5 mm filter to fit in the back of my Zenitar-MC 16mm fish-eye, but I would like 43 x 0.75 mm and 52 x 0.75 mm filters to fit my CZ 35 Biogon and CV35 Nokton. I do have B+W filters for these and if I take the whole of a shoot with one lens, that is fine but otherwise I have to do split C1 DNG processing as the B+W filters require a slightly different icc camera profile.

 

Wilson

[carstenw]

You could put Leica glass in a B+W filter frame, as an immediate solution.

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[wlaidlaw]

You could put Leica glass in a B+W filter frame, as an immediate solution.

 

Carsten,

 

The one I really need the Leica filter for in place of the B+W, is the CV35 Nokton and there is not a Leica 52mm filter. I know I could get a larger one and then take it to an optician to get it cut down, then mount it in another mount (I have lots of old 52mm UV/Skylight filters lying around). However, I think that is even harder work than using two icc profiles. I will just put in a request for Leica to get round to it sometime.

 

Wilson