coll. Elmar 50/3.5 OK on M8 collapsed?

[ampguy]

Anyone using this lens on the M8? Is collapsing it safe?

I don't have one of these, but have another lens that goes almost as deep, deeper than a coll. Cron, but not quite as deep as the Elmar 50.3.5.

 

[johannielscom]

I seem to remember a thread on here about several lenses that were able to collapse into the M8.

The Summar amongst them. I tried this when I still had my M8 and it was true.

So, if you could figure out any differences between an Elmar and a Summar, you'd know.

 

[ampguy]

Thanks

Thanks

From what I can dig up, the old Elmars go back deeper than the Summars.

I seem to remember a thread on here about several lenses that were able to collapse into the M8.

The Summar amongst them. I tried this when I still had my M8 and it was true.

So, if you could figure out any differences between an Elmar and a Summar, you'd know.

 

[johannielscom]

Calling assistance, can anyone compare the collapsed-depth of a Summar and an Elmar 50/3.5? 🙂

 

[jsrockit]

I'd love to know which collapsibles are safe as well...

 

[ampguy]

here's a start

here's a start

My '53 or '54 collapsible cron has no issues, and I've never heard of any with any M8 with this lens.

I'd love to know which collapsibles are safe as well...

 

[ampguy]

Rob F (he is around here?) posted on another forum that his 50/3.5 Elmar collapsed 22.2mm beyond the flange, his Summar 17.5mm, and his coll. Cron 11.5mm.

My ltm hex 50/2.4 at inf. focus (furthest back) measures crudely at about 14mm, so in-between the Summar and coll. Cron.

If the Summar is safe, then the Hex 50/2.4 should be safer, but I think I'll wait for more confirmations before collapsing.

 

[ItsReallyDarren]

Has Leica weighted in on collapsing lenses on the M8? Or do they suggest wrapping tape around the barrel to prevent too much of the lens barrel from going in?

 

[Beemermark]

Is the flange to sensor distance any different than the flange to film distance on a Leica M? I would think not. Since neither lens hits the film plane collapsed I doubt it would hit the sensor. is there anything between the flange body and sensor?

This question comes up so often and I always wonder why. The Leica M5 and CL had the metering arm between the film plane and flange, the arm swung out of the way when the shutter was depressed. A lens could not collapse too far into the body without contacting the meter arm. I've yet to see any M (or LTM) body besides these two with anything between the flange and film plan. So what do your think you could damage by collapsing the lens?

 

[ampguy]

not sure Darren

not sure Darren

I'll call them.

Has Leica weighted in on collapsing lenses on the M8? Or do they suggest wrapping tape around the barrel to prevent too much of the lens barrel from going in?

 

[ampguy]

yes

yes

The main thing that is not known where it lies is the shutter mechanism in the M8 vs film.

Also, the sensor has a cover over it, though very, very thin...

Is the flange to sensor distance any different than the flange to film distance on a Leica M? I would think not. Since neither lens hits the film plane collapsed I doubt it would hit the sensor. is there anything between the flange body and sensor?

This question comes up so often and I always wonder why. The Leica M5 and CL had the metering arm between the film plane and flange, the arm swung out of the way when the shutter was depressed. A lens could not collapse too far into the body without contacting the meter arm. I've yet to see any M (or LTM) body besides these two with anything between the flange and film plan. So what do your think you could damage by collapsing the lens?

 

[jsrockit]

I've heard the newer black elmar 50mm is safe as well.

 

[Beemermark]

The main thing that is not known where it lies is the shutter mechanism in the M8 vs film. Also, the sensor has a cover over it, though very, very thin...

I understand. Never had an M8. Is it possible to measure the depth? I guess not.

 

[maddoc]

Can't speak about the M8 but the coll. Elmar 50/3.5 collapses safe into the M7 and not the M4-P (the shroud in front of the shutter is much thicker in the M4-P compared to the M7). The Summitar is safe on both, M4-P and M7.

 

[kermaier]

Is the flange to sensor distance any different than the flange to film distance on a Leica M? I would think not. Since neither lens hits the film plane collapsed I doubt it would hit the sensor. is there anything between the flange body and sensor?

This question comes up so often and I always wonder why. The Leica M5 and CL had the metering arm between the film plane and flange, the arm swung out of the way when the shutter was depressed. A lens could not collapse too far into the body without contacting the meter arm. I've yet to see any M (or LTM) body besides these two with anything between the flange and film plan. So what do your think you could damage by collapsing the lens?

The shutter could be placed at almost any point between the flange and the sensor, and so might vary in distance between the M3 and the M8. (And of course the flange-to-shutter distance might be different for different manufacturers, like Konica, Epson, Cosina, Zeiss.)

Another consideration is the width of the light-baffling pathway between the flange and the shutter, combined with the width of the rear edge of the collapsible lens barrel tube. If it's a few millimeters narrower on the M8 than on earlier M cameras, and a particular lens has a wider than average tube, then the edges of the collapsing barrel tube could scrape against the baffles.

For example, on the Epson R-D1, the Elmar 50/3.5 cannot be collapsed safely; the vintage Elmar 50/2.8 can; the modern Elmar-M 50/2.8 cannot.

::Ari

 

[Olsen]

Is the flange to sensor distance any different than the flange to film distance on a Leica M? I would think not. Since neither lens hits the film plane collapsed I doubt it would hit the sensor. is there anything between the flange body and sensor?

This question comes up so often and I always wonder why. The Leica M5 and CL had the metering arm between the film plane and flange, the arm swung out of the way when the shutter was depressed. A lens could not collapse too far into the body without contacting the meter arm. I've yet to see any M (or LTM) body besides these two with anything between the flange and film plan. So what do your think you could damage by collapsing the lens?

In principal, you are right, but the rear end of a collapsible lens will first touch the shutter. Not the film. Most likely (but I would not know for sure) the distance from the rear end of a collapsible Leica lens and the shutter curtain of a M8/9 is the same as on any of the film models.

 

[ampguy]

difficult

difficult

static measurement is easy, but not sure what motions the shutter would make towards the lens, if any.

I understand. Never had an M8. Is it possible to measure the depth? I guess not.

 

[ampguy]

yes

yes

I have also read that the 50/2.8's Elmars collapse safely but don't personally have one, or know it's measurements.

I've heard the newer black elmar 50mm is safe as well.