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Rental camera gear destroyed by the 2017 eclipse

lensrentals.com

61–70 of 158 posts

Re: Rental camera gear destroyed by the 2017 eclipse

#61
post #9

Earlier quoted context omitted.

> And of the things returned, we were equally impressed with our customer-base, and their guilt and owning up to the damage. I thought the renters would be paying for it?

Still, lots of people might feign ignorance.

You can feign ignorance. It doesn't change the fact that the lens has a burn hole on it now.

Re: Rental camera gear destroyed by the 2017 eclipse

#62

It's a shame that Lens Rentals had to suffer such material loss, but that report is absolute gold-plated first-hand evidence for my perennial debates with other photographers who insist that they don't need Solar protection for eclipses. "But I took a landscape shot at midday with the Sun in frame and it didn't melt my sensor". The difference being the length of exposure and the concentrations of energy.

Just to clarify, there’s no concentration of energy involved with the eclipse itself. The concentration involved is no different than setting a leaf on fire with a magnifying glass on a regular day.

The sun isn’t a garden hose. Putting something in front of it doesn’t make the edges more intense.

Re: Rental camera gear destroyed by the 2017 eclipse

#63
post #4
post #2

Now imagine that kind of damage being done to your eyes. It hurts just thinking about it, yet some people don’t seem to really believe the warnings.

I'd argue this is slightly worse because the cameras have higher magnification lenses* vs our naked eye. This might be more akin to looking into a telescope with your eyes. Edit: To elaborate - Higher magnification lenses (depending on the camera lens used of course) Edit 1: - /u/corndoge Suggests that people may take this the wrong way. I mean to say in the amount of physical damage it's worse for camera's because o…

It's not so much about the magnification as it is about the light-gathering surface. The human eye has a relatively small aperture; a professional camera lens has a huge aperture, and it focuses all the light from there onto the camera sensor.

Higher magnification actually makes it slightly safer, because the image of the sun ends up magnified and spread out over a larger part of the sensor. Low magnification means it all goes to one point.

Re: Rental camera gear destroyed by the 2017 eclipse

#64
post #30

Earlier quoted context omitted.

You can torch your sensor in seconds: https://youtu.be/2TO_yZDxryQ

Yeah, if you use a super-telephoto lens, then take your camera body off and change the focal point so that you are using your lens as a magnifying glass like they did in the video. No doubt. For the rest of the sane world; however, it's not quite that risky. For reference, that Leica I used in my shot is a one of a kind as it was the first lens to roll off the line when Leitz branding was changed to Leica & estimated…

Surface damage mostly depends on the power density, not on total power, so it depends mostly on the aperture, not on the focal length. This makes longer focal lengths safer to point at the sun because they are slower lenses. They are also safer if you don't explicitly point them at the sun because they are less likely to catch the sun in the smaller field of view.

Burned shutter cloths on Leica M series cameras with wide angle lenses is a real problem that can happen simply if you leave the camera without a lens cap lying on a table. This is less of a problem on most other cameras, as they use metal shutter curtains.

Re: Rental camera gear destroyed by the 2017 eclipse

#65

Earlier quoted context omitted.

Yeah, if you use a super-telephoto lens, then take your camera body off and change the focal point so that you are using your lens as a magnifying glass like they did in the video. No doubt. For the rest of the sane world; however, it's not quite that risky. For reference, that Leica I used in my shot is a one of a kind as it was the first lens to roll off the line when Leitz branding was changed to Leica & estimated…

No, it is the opposite. A 50mm f/1.4 lens focus the light and the heath much more than a 300mm f/5.6. You were quite lucky with your camera I guess.

Correct.

The flux for the sun on the sensor/film/whatever is:

    Φ/4α² * 1/A²
Where Φ is the sun flux at the surface of the earth, and α is the angular diameter of the sun. A is the f-number of the lens, the only variable in this equation. It doesn't depend on focal length.

The total power over the film is:

    Φ/4πα * f²/A²
which does depend on focal length, but that is usually not the determinant factor, as for surface burns the damage depends mostly on the flux.

Re: Rental camera gear destroyed by the 2017 eclipse

#66
post #33

Those were some expensive mistakes. Some of the gear mentioned: Canon C300 Mark II ($9,999) and Canon 600mm f/4L IS II USM ($11,499).

Nobody is going to throw that gear away. They'll replace the diaphragms but the glass and body should be fine.

No, but expensive things have expensive parts/repairs. Just pointing out for those not in the field that this was pro level gear.

Re: Rental camera gear destroyed by the 2017 eclipse

#67
post #42

I think my favorite part of this article is how the author is so understanding and positive about his users. I think if I had rented out cameras to people, told them not to point it at the eclipse, and then got a bunch of damaged cameras back, I'd be pissed. In fact, I might have choice words for those customers. I think there's a lesson here in targeting inexperienced consumers. Perhaps a good preventative measure w…

Why would he be angry? The customers are paying for the damage.

There's still a potential opportunity cost from temporarily not having those damaged items in stock.

Re: Rental camera gear destroyed by the 2017 eclipse

#68

It's a shame that Lens Rentals had to suffer such material loss, but that report is absolute gold-plated first-hand evidence for my perennial debates with other photographers who insist that they don't need Solar protection for eclipses. "But I took a landscape shot at midday with the Sun in frame and it didn't melt my sensor". The difference being the length of exposure and the concentrations of energy.

They have an in-house repair shop that dealt with most or all of it, and they charge the customer for the cost of the repair. From the comments the fact that they don't gouge on repairs is one reason some folks use them.

How do you fix a burnt cmos sensor? I feel like canon would charge you near enough the full replacement price.
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