Biagon 25 setting

[viramati]

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I remember someone posting that it was best to set the Zeiss Biagon 25 to a 28 Elmarit but which one should I use. Thanks

[adan]

I believe it was the 28 f/2.8 ASPH.

[AlanJW]

My Biogon is coded as a 24 Elmarit - did that when I had my M8. There was some discussion of the 24 coding overcorrecting. However, in my use which is mostly outdoors, I just don't see overcorrection so rather than go through the trouble of recoding, for now I am leaving it as is. That might be a matter of my copy of the lens or simply personal preference. My advice is to experiment a bit using the manual settings as you may have a different opinion.

[stevem7]

I have tested all setting with the 25 and M9 and the 28 Elmarit ASPH setting is the best. On the 24 Elmarit setting you get vignetting and the pink/red left side syndrome. Thanks to Jono Slack for discovering this first.

 

Steve

[viramati]

thanks guys

[jonoslack]

David

Steve - thanks for the message

 

Hi - I just saw this - sorry for the delay in posting.

 

I tested this lens with every one of the lens options from 16mm WATE up to all the 35mm options. (sad bastard that I am!)

 

I've spent many hours on this, and, assuming that each lens is the same (which it may not be), then I found the following.

 

1. coded as a 24 elmarit gives you least vignetting . . . and red left hand edge (sometimes quite severe). Clearly if you're using it for black and white this won't be much of an issue.

 

2. registered as a 28 elmarit asph gives you more vignetting, but almost no colour pollution.

 

HOWEVER

if your lens was given the 24 / 35 framelines for the M8 (like mine) you won't be able to re-code it as a 28 elmarit - 35 yes, 24 yes, 28 no. This means that you'll have to use manual lens recognition.

 

I tell you this to save you spending hours and hours with nail varnish trying to get the coding right (like I did!).

 

all the best

[AlanJW]

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David

Steve - thanks for the message

 

Hi - I just saw this - sorry for the delay in posting.

 

I tested this lens with every one of the lens options from 16mm WATE up to all the 35mm options. (sad bastard that I am!)

 

I've spent many hours on this, and, assuming that each lens is the same (which it may not be), then I found the following.

 

1. coded as a 24 elmarit gives you least vignetting . . . and red left hand edge (sometimes quite severe). Clearly if you're using it for black and white this won't be much of an issue.

 

2. registered as a 28 elmarit asph gives you more vignetting, but almost no colour pollution.

 

HOWEVER

if your lens was given the 24 / 35 framelines for the M8 (like mine) you won't be able to re-code it as a 28 elmarit - 35 yes, 24 yes, 28 no. This means that you'll have to use manual lens recognition.

 

I tell you this to save you spending hours and hours with nail varnish trying to get the coding right (like I did!).

 

all the best

Thanks Jono. Finally understandable. I do have the 24/35 framelines for M8. But why wouldn't it make sense to wait to see what Leica does in the next firmware before Irecoding the lens?.

[jonoslack]

Thanks Jono. Finally understandable. I do have the 24/35 framelines for M8. But why wouldn't it make sense to wait to see what Leica does in the next firmware before Irecoding the lens?.

 

Hi There

I still have the 28 mount that came with the lens . . . but, as you say, I'm waiting to see what happens next, and, in the meantime I'm manually coding the 25 biogon as a 28 elmarit ASPH - which is bothersome, but not that bad . . I have dedicated one of my user profiles to it, which works well.

 

If it's still the case after the next firmware update then I'll get the mounts changed and code it as a 28.

 

all the best

[viramati]

Thought you might like to see what this lens can do. this is straight out of M( with no alteration in LR2.6 (was set at 24mm as it is 6 bit coded and I had forgot to enter it as 28mm asph)

P.S. I am not that good at posting web images in this way as I am having to export to CS4 so as to be able to down size for web. If anyone can tell me how to do this straight from LR2 I would be grateful

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[Arwendur]

Thought you might like to see what this lens can do. this is straight out of M( with no alteration in LR2.6 (was set at 24mm as it is 6 bit coded and I had forgot to enter it as 28mm asph)

P.S. I am not that good at posting web images in this way as I am having to export to CS4 so as to be able to down size for web. If anyone can tell me how to do this straight from LR2 I would be grateful

 

Export a JPG for the Web:

 

Go... File > Export to bring up the dialog window as per attached image below. It's all fairly self explanatory from there on. If for the web choose JPG with the 'Format' tab and another box will appear to set the quality level as you may need to compress it down to adhere to a particular Forum file size limit such as this Forum's limit of 293.0kb and max 960 x 960 pixels for a JPG. Set 8 bits and 72dpi and the size you need. (No need for more bits or dpi for the web.)

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[thrice]

It is certainly one of the sharpest non-tele lenses I've ever shot with. at F/4.0 sharpness across the frame is bewildering.

[joshtpa]

2.8 on the M8.2….Don't have an M9 yet...

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[thrice]

 

Both with the 25 Biogon.

[lej47 (Larry)]

What lens code is optimum for the f 2.8 25mm Biogon on an M8.2 ?

 

Could someone please post a photo of the new lens mount, with ridges, that make sharpie codes last longer ? My 50mm C-Sonnar has the flat mount.

 

This lens is certainly in my future. Possibly with a B&W 092 filter for Infrared.

 

TIA, Larry

[jonoslack]

What lens code is optimum for the f 2.8 25mm Biogon on an M8.2 ?

 

HI Larry - as a 24 f2.8 elmarit - that's how I always coded it - it's only with the M9 that you do better as an Asph 28 elmarit.

 

Were those on the M9 thrice?

[AndrejK]

What lens code is optimum for the f 2.8 25mm Biogon on an M8.2 ?

 

Could someone please post a photo of the new lens mount, with ridges, that make sharpie codes last longer ? My 50mm C-Sonnar has the flat mount.

 

This lens is certainly in my future. Possibly with a B&W 092 filter for Infrared.

 

TIA, Larry

 

Here is a photo of my Biogon 28/2.8.

I have same kind of mount on my C Biogon 21/4.5, Biogon 35/2 and C Sonnar 50/1.5 lenses.

The code will last until you decide to remove (change) it.

Andrej

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[lej47 (Larry)]

Thanks, That answered my question. My C-Sonnar is machined that way, after all.

Thanks, again.

Larry

[sg.eson]

HI Larry - as a 24 f2.8 elmarit - that's how I always coded it - it's only with the M9 that you do better as an Asph 28 elmarit.

 

I plan to buy the Biogon 25, to be used on a M9 (which I do not have yet). If I want to code it as an Elmarit 28 Asph as recommended, does it matter what frame-lines it will mount. Does the code override e g a 35/135 mount, giving the correct coding despite showing the 35 frameline? Or must I also have the 28/90 mount to make the camera accept the coding as the Elmarit 28 Asph? I´m sorry for asking this maybe basic question, but I want to be sure before I order the lens. Using it on a film M is of course uncomplicated, since the choise of mount doesn´t matter using an external viewfinder anyway.

 

I have also read comments on this forum that the Zeiss external viewfinder 25/28 might be showing too little in the frame for this lens (suggesting that the 21 viewfinder is more accurate for the 25mm lens). Any experiences/comments on this? Otherwise I could guess that the 28 frame could be reasonably accurate on short distances and the 25 frame on longer distances.