YES...locking the mirror up eliminates mirror-up vibration, and in some cameras, allowed an extra frame per second or so on the highest motor drive setting, since the mirror did not have to go up and down, up and down, at high speed. In some fields, like photomicrography, the slightest vibration could negatively affect image sharpness, so, mirror-up was an offered part of the higher-end Nikon cameras. Also, there were/are some older "intrusive" lenses, which protruded rearwardly inside the mount and into the mirror box area proper, lenses like the old 21mm f/4; on this type of lens, the mirror absolutely MUST BE UP, in order to use the lens and shoot pics!!! Typically, an auxilary viewfinder was fitted to the camera, and the uber-wide (for its era!) lens was mounted to the camera, and shot with the mirror locked up.

"SOME SHOWS BATTERY CORROSION (ONLY ON OUTER PART DOES NOT AFFECT FUNCTIONALITY)"
Is it safe to buy cameras at low prices that have what's quoted above? How would you clean it if possible???
Congrats on the new camera.Well I guess it is good I got the f5 instead of the f100. As I would like to get into macro photography.
Nikon f5 is an excellent choice because it is more lighter and sharper as compared to nikon f100
On long exposures, the action of the mirror moving can create vibrations affecting exposure; the possibility of blurring on critical imaging. It's more a problem with macro photography and the sometime longer exposures. Usually composition has been done, so you're just trying to dot the i's...Why would you need mirror lockup on a film camera?
If you ever used an RB67, it has a mirror vibration that will rattle your teeth (just slightly exaggerated). I frequently locked it up when taking macro shots.
It was meant mainly in jest. I used the RB for almost 20 years, and maintained it religiously, since it was my primary portrait camera. The mirror vibration is greater than that on my old Hassy 500C, but I never had any problems with the Mamiya.On long exposures, the action of the mirror moving can create vibrations affecting exposure; the possibility of blurring on critical imaging. It's more a problem with macro photography and the sometime longer exposures. Usually composition has been done, so you're just trying to dot the i's...Why would you need mirror lockup on a film camera?
If you ever used an RB67, it has a mirror vibration that will rattle your teeth (just slightly exaggerated). I frequently locked it up when taking macro shots.
It may feel that way, but the RB has a rather nice dampener at the end of the mirror travel that is very effective. If you can actually feel the vibration of the mirror going up, your body needs servicing.
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I am thinking about getting a nikon f100 because it is slimmer and lighter.
What are the advantages and disadvantages of the two? Like why would you want the nikon f5 over the nikon f100?
(its all about the glass) the camera does nothing without the Photographer some may prefer weight some may not! these matters are more a personal preferenceNikon F100 is an excellent choice for all type of photography. It is more light weighted and durable as compared to F5.
(it's all about the glass) when it comes to SLRs (35mm cameras) the camera does nothing without the Photographer some may prefer weight some may not! these matters are more a personal preferenceNikon F100 is an excellent choice for all type of photography. It is more light weighted and durable as compared to F5.
To reduce possible vibrationWhy would you need mirror lockup on a film camera?
Wasn't suggesting otherwise- I was just explaining the whole rationale for mirror lockup. Glad to hear that the F100 is so well dampened- since I have one! Honestly haven't ever done any long exposure shooting with it.To reduce possible vibrationWhy would you need mirror lockup on a film camera?
No need for mirror lock-up on the F100. The mirror is well dampened. I tested it.