Olympus film camera 300mm 4.5 lens remove to clean rear element
Hello and thanks ahead of time. With the small tools I do have, am I going to be able to remove the rear element assembly to clean off what looks like surface mold (on both sides) and then reassembly
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Most camera's can't focus when the aperture number is above 5,6. Although your tele zoom starts at 4,8, it reaches the 5,6 at about 150 mm. So from there and up it can't auto focus. You still should be able to focus manually, but for wild life or sports pictures, it is useless.
35mm Is a film size. This 18 - 200mm & 18 - 300mm lens are both compatible with 35mm film size. 35mm film is standred film or youcan say ameture film rolls. I hope you understand my suggeation. Thanks.
Depending on how new your Minolta SLR film camera was, the lens may or may not work on a Minolta Digital SLR. In many cases, a lens with the correct mount (in this case, a Minolta mount) can be used on the same brand of camera in the digital format.
One thing you should know is that DSLR sensors are, generally speaking, smaller than the size of a 35mm film negative. Long story short, that means that your lens will have a magnification factor on the DSLR. Usually, it is in the range of 150%, so a 70-300 lens from a film camera would cover 105 to 450 on a Digital SLR.
To be sure about the mount, you'll need to seek advice specific to Minoltas -- probably best to take your lens to a local camera shop and see for sure if it fits and what features will work (aperature, auto-focus, etc) and which won't work on the DSLR.
Front element? You can remove this without alignment worries. The lens zoom mechanism tends to **** in the dust.
Have a look at the front element outer ring. There are 3 black screws. Remove these using jewellers screwdriver (y'know, a very small posi-drive one!). Remove this plastic outer ring. Now you can see three small silver screws, that are about the same size - when you try to unscrew them, they just rotate...
This is as they are not screws, but as mentioned elsewhere - they are plugs (if you notice, they are slightly under the casing. Get a small flat bladed screwdriver, and gently prise them out. Now you can just drop the front element into something sensible - like a microfibre cloth (give it a clean whilst you're there.
Get a rocket blower (NOT canned air), and blow away the dust, and you can use the microfibre cloth (or similar) on the small inner front element.
Then replace the outer front element - you will see where it drops into place - there are plastic guide tabs. Push back the silver 'screw' plugs.
Then screw back on the plastic outer ring and you're done - takes 20 minutes at the most.
The markings on the lens barrel are for macro mode purposes. When the zoom ring is set for 300mm that is the distance you are shooting at. It will zoom the barrel all the way out to 300mm if it needs to to help to obtain focus on the subject.