Appeal for a photography tech sub-forum

[ErikKaffehr]

Hi Chris,

A point is 1/12 of a pica which is 1/72 of a foot.

But I guess the OP means "period", like end of discussion.

Best regards
Erik

What's the point? 

[Theodoros]

What's the point?  

Maybe.... this!

[eronald]

It really depends on how you call people you don't know mr. Vlahojevic

At this point I'd like to call y'all a Taxi!

Edmund

[Theodoros]

At this point I'd like to call y'all a Taxi!

Edmund

Suggest to catch the train would be better....

[Theodoros]

:-)

Thanks for explaining things, Slobodan. With my Scandinavian programming of mind it is a bit hard for me to follow what "theodoros" has on his mind

Best regards
Erik

I don't know why you talk for me with others... can't you just reply on my quotes? .... is it difficult for you? ...does it hurts?

[Slobodan Blagojevic]

It really depends on how you call people you don't know mr. Vlahojevic...

Hey, I was just following the path of the Master! I noticed you repeatedly referred to another member, Bill (bjanes), as "B ill" ... real classy.

[Theodoros]

Hey, I was just following the path of the Master! I noticed you repeatedly referred to another member, Bill (bjanes), as "B ill" ... real classy.

But never noticed that B ill is the master ....eeeh? Funny... you can only see the reflections... never the light!

[HarperPhotos]

Michael please close down this ridicules thread!!!!!!

[Theodoros]

Agree... it's the right moment!

[Slobodan Blagojevic]

Michael please close down this ridicules thread!!!!!!

As a reminder, a thread can be locked by the thread starter just as well.

[Theodoros]

As a reminder, a thread can be locked by the thread starter just as well.

I think I saw Synn walking away earlier....

[synn]

Why would I wanna lock this thread when everyone is going on and on about freedom to say whatever they want? This thread is 100% freedom certified. Uncle Sam would be proud!

Besides, it keeps most of the yelling and techno ranting confined to one place, which in a way accomplishes what I set out to do.

[Kevin Raber]

I don't like to lock down threads.  However, let's either keep on track or move on to other topics.  This one has lost its way.

Kevin Raber

[Wayne Fox]

Erik,

 I think have heard that if you fly too often your back may lose pixels or even columns.
 I lost a column both on the P45+ and on the M8, and unfortunately both do not allow the user to remap.
 I Don't know how this translates to mountains, I think you know better than I do about atmospheric attenuation of the various forms of radiation that might harm a CCD. Of course, these imager designs originated in airborne and spaceborn sensors, but maybe those have much larger feature geometries.

 I wonder if this is true, and how CMOS is affected. Of course most consumer cams can remap.
 
Edmund

Maybe this is urban legend? certainly a lot of posters here are frequent fliers and I don’t remember it being brought up.

 While I’ve heard of bits on a hard drive getting flipped by alpa particles at high altitudes, and hard drives themselves having trouble because of internal pressure at extremely high altitudes (15000 feet and up) with climbers, I’ve never heard it mentioned this is an issue with sensors.

But I could be wrong ... color me curious on this one.

[Jim Kasson]

While I’ve heard of bits on a hard drive getting flipped by alpa particles at high altitudes, and hard drives themselves having trouble because of internal pressure at extremely high altitudes (15000 feet and up) with climbers, I’ve never heard it mentioned this is an issue with sensors.

Alpa particles only affect tech cam photographers.

Jim

[Slobodan Blagojevic]

Alpa particles only affect tech cam photographers.

Good to see engineers can have a sense of humor too (that is, in addition to graphs and numbers)

[ErikKaffehr]

Hi,

I don't think it is an urban legend. Facts are:

• There are cosmic particles with very and even extremely high energies
• Microelectronics are sensitive to radation

But:

• Cosmic particles reach earth surface, it is just that they are more abundant at altitude
• Feature size on sensors is larger than on other micro electronics, so I guess they be less sensitive to particle damage.

Some modern cameras are said to map out bad pixels automatically, like once a month.

BTW, the hard disk issue is different. The read/write head of the disk is travelling on an air cushion while in operation. Reducing air pressure the heads are said to make contact with disk, causing surface damage.

Best regards
Erik

Maybe this is urban legend? certainly a lot of posters here are frequent fliers and I don’t remember it being brought up.

 While I’ve heard of bits on a hard drive getting flipped by alpa particles at high altitudes, and hard drives themselves having trouble because of internal pressure at extremely high altitudes (15000 feet and up) with climbers, I’ve never heard it mentioned this is an issue with sensors.

But I could be wrong ... color me curious on this one.

[eronald]

I found a reference here. and here.
Of course if you use vintage lenses, all bets are off.

Edmund

Hi,

I don't think it is an urban legend. Facts are:

• There are cosmic particles with very and even extremely high energies
• Microelectronics are sensitive to radation

But:

• Cosmic particles reach earth surface, it is just that they are more abundant at altitude
• Feature size on sensors is larger than on other micro electronics, so I guess they be less sensitive to particle damage.

Some modern cameras are said to map out bad pixels automatically, like once a month.

BTW, the hard disk issue is different. The read/write head of the disk is travelling on an air cushion while in operation. Reducing air pressure the heads are said to make contact with disk, causing surface damage.

Best regards
Erik

[BernardLanguillier]

While I’ve heard of bits on a hard drive getting flipped by alpa particles at high altitudes, and

Most business frequent flyers can testify to the fact that even if it does happen, modern OS is able to correct these issues seamlessly.

hard drives themselves having trouble because of internal pressure at extremely high altitudes (15000 feet and up) with climbers.

Most HD are not specified to operate above 10,000 feet since they rely on air lift for their heads.

Cheers,
Bernard

[eronald]

Most business frequent flyers can testify to the fact that even if it does happen, modern OS is able to correct these issues seamlessly.
Cheers,
Bernard

You are quite right if by modern you mean japanese. My P45+ was a service issue, and my Leica also needs a service visit, I believe, which it won't get because it's just too expensive. Dropping a column means you have a line right through your image, its more than a minor irritation.

Edmund