Lens Detection Menu

[adavis47]

So, what happens when in your lens detection menu you have ON+UV/IR selected and you slap on a lens without coding or filter and don't change this setting? What exactly changes in the camera when you have ON+UV/IR as opposed to OFF or just ON? Thanks

 

[jaapv]

If the lens is not recognized the feature does not work.

 

[adavis47]

If the lens is not recognized the feature does not work.

Thanks jaapy. So then, if you change to an uncoded or unfiltered lens you really don't need to go in and change the menu?

 

[kully]

It is there "to be safe" when it is off un uncoded lens won't be mistaken for a coded lens by an errant screwhead or other mark which happens to be in the same place as the dots on a coded lens.

 

[Rayt]

If you mount an uncoded lens then the camera would not activate features that would otherwise affect a coded lens. That I understand. But what if your lens is coded but then you select by mistake the "on" or "on + uv/ir" option? Wouldn't that screw up your picture to some degree for example when the camera is compensating for a filter you don't have mounted?

 

[jaapv]

Yes and no. No if you only select on and haver no filter mounted, no if you select on+IR and have a filter mounted, then it operates correectly. If, however, you make an input error and switch the two options by mistake there will be undesirable vignetting. Red and cyan respectively.

 

[Ben Z]

I have had my M8 set for ON+UV/IR (I have short lenses coded and all lenses with IR filters) since the beginning, never had a problem, other than the following.

I don't know about 3rd-party M-mount lenses because I don't own any, but be wary of late 70's to early 90's pre-ASPH Leica lenses. Many if not most of them have a rear flange mounting screw that lands smack dab over the code reader and acts like a black bit-code, reacting with whatever frameline is active to fool the M8 into thinking the lens is coded. My pre-ASPH 21 Elmarit, v.IV 35 Summicron, 50 "tabbed" Cron, and "thin" 90 T-E and 90 pre-ASPH Crons all have such a screw. A dab of white enamel over the screw head cloaked it from the reader. The only ones I didn't need to paint white were the 90 T-E, because it just so happens the combo of the screw placement and the framelines coincides for the code for that lens; and the v.IV 35 Cron, because the screw is sort of in the middle between the 2 black bits needed for coding, so I milled around both sides of the screw area and painted the whole area black.