If the rubber is Neoprene, then Benzene will soften it and maybe even cause a little swelling if overdone. Neoprene is the most common rubbber for O-rings. Usually black. Benzene is the active ingredient in transmission stop leak treatments.
Avoid too many fumes.

I found it to be a problem shooting the moon. I use live view to help focus the moon image. One can zoom way in on the image in live view using the + button. However, it is so bright it causes the moon image to bloom, so closing the aperture to its shooting value will stop the blooming, allowing very accurate focusing.
Works great with the D800E but not so with the D7000 because the aperture doesn't close down when asked to, such as using the DOFP feature. Seems like a simple fix in the firmware would take care of this oversight. I see no reason for it not to work this way.

I own a D7000 and have discovered that the DOFP does not function in live view mode. This was confirmed by Nikon tech support.

So my question is does the DOFP work in live view for the D7100?

I also own a D800E and the DOFP does work in the live view mode for this camera.

Just in case ....... DOFP = depth of field preview.

The main problem with the D7000 live view mode is because there is a bug in the firmware. I was also attempting to take some moon shots. I was going to focus the lens in live view because you can zoom in and focus this magnified image. The moon was causing the image sensor to bloom some so I thought I would fix this by hitting the depth of field preview to close down the aperture to what I had set it to in the manual mode. Turns out that at least for the D7000 the DOFP does not function in live view. I ask Nikon support about this and they confirmed my finding pointing out that the D7000 has no DOFP function in live view. So I had to focus using the optical view finder.

Interesting to note that my D800E does allow DOFP in live view.

Checked out the latest firmware update for the D7000 and still no mention of fixing this problem yet.

I got very lucky and managed to buy the new Tamron 150-600mm zoom lens without being on a waiting list. I took some moon shots. They are cropped down to just the moon. They were taken with a D800E and a D7000. With this lens you can quickly see how crumby your tripod is. I have an Induro tripod with a ball head and if a breeze comes along the moon does a dance with the lens set to 600mm. Because of the weight of the lens, adjusting the camera and lens together on a ball head is difficult. Thinking a pan and tilt head would be better.
Discovered an interesting issue with the D7000. The first picture I took I used the D800E. Set it up in live view, zoomed in on the LCD display, pushed the DOF preview button to close down the aperture and focused the lens manually. Tried to do the same thing with the D7000 but discovered that the preview feature does not work in the live view mode, so I had to use the viewfinder for focusing because the moon is so bright that the LCD screen blooms making focusing next to impossible unless the lens is stopped down.
Incidentally the focus adjustment on the Tamron lens is one of best I have used. Very smooth and insensitive to setting the focus. In other words it was easy to focus, whereas most of my Nikon lenses are very touchy.
Sure hope the new D7200 has an articulating LCD.

D800E

(Download)

D7000

(Download)

I owned the Nikon 18-200mm lens and kept it on my D7000. In spite of the warning about it being soft, I found it to be very acceptable. When the 18-300mm came out I bought one to replace the 18-200mm lens. After shooting with this lens my impression is that it is a little sharper than the 18-200mm and am extremely happy with it. In fact I was so impressed that I also bought the 28-300mm full frame lens for my D800E.
Yes there is some distortion at the wide end on all of them, but PP can correct that quite nicely. Heavy? Yes, but considering that is all one needs for most general shooting, it's a worthwhile and in the end a lighter overall load to carry around.
By comparison the performance of some of the large zoom range cine lenses must be extremely expensive and they stay in focus as they are zoomed. I think the definition of a zoom lens is that it maintains focus throughout its zoom range. What still photographers call a zoom lens is actually variable focal length lenses.

The military and security agencies were digitizing aerial and satellite imagery as far back as the 50s. The company I worked for made film scanners that resolved the image into 1 micron pixels on large format film, such as 8 x 10 inches. It took all day and filled several reels of tape to scan a single image.
Satellites started in the early 60s.
Some aerial cameras used the forward motion of the airplane as the scanner/shutter and exposed very long rolls of film, producing long continuous images.
Early film satellites ejected cartridges of film that were grabbed in midair by airplanes, then processed at the closest military base, scanned and sent to the end user for analysis.
Then when IR started being used the signal was transmitted to the ground. Not as much use of film after that.
Then many custom imagers were built for specific satellites which generated digital signals directly and these were radioed down. There were some very large sensors made, some were arrays of large sensors.
Fun days.