Question about Olympus Zuiko 300mm f/2.8 Lens

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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 
thanks

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Yes, it's fairly straightforward, but the fungus will have permanently damaged the lens element and is likely to spread.

Afterwards you may need to get the element adjusted (collimated) by a lens repairer.

Posted on Jun 23, 2009

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Find serial number on canon lenses


Remove the rear lens cap and you should find the serial no. round the back element of the lens.

Mar 11, 2014 | Canon 75-300mm f/4-5.6 III USM EF Lens

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I have the 70-300mm and for some reason i cant get it to focus either on auto or manual. it was working ok on day then took it out in the snowy weather and it wouln't work. can anyone help?


Quick temperature changes may cause this. I have the same lens. May be you must clean the pins while attaching lens to the body. If this information will help you please give your vote. Good Luck.

Jan 18, 2010 | Olympus Zuiko 70-300mm f/4-5.6 Digital ED...

1 Answer

Dirt inside back lens element


The dirt has gotten onto the front element of the rear lens group. You do not want to try partially disassembling the lens to clean it. Either Tamron or a good camera lens repair technician should be able to perform what is called a partial internal CLA (cleaning, lubrication and adjustment) of just rear portions of the lens for fairly cheap. Alternatively you may be able to pick up a used Tamron 28-200 in excellent condition for less than the repair cost of your current lens. If successful, then you could turn around and sell your 28-200 for parts or sell it to someone who knows how to service it.

Aug 10, 2009 | Tamron 28-300mm f/3.5-6.3 DI XR for Canon

1 Answer

Cameras compatible with Quantaray AF 70-300mm lens


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.

May 31, 2009 | Quantaray AF 70-300mm f/4.0-5.6 High Speed...

3 Answers

I have dust under outer lens on my 75-300mm f/4 -5.6 III USM


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.

Jul 02, 2008 | Canon 75-300mm f/4-5.6 III USM EF Lens

1 Answer

Zuiko 70-300mm


I spoke to our local J&A Camera shop who gave me a short tuition on the lens.
Most of this I was aware of.
Thank you to J&A and yourselves.
Malc

Jun 25, 2008 | Olympus Zuiko 70-300mm f/4-5.6 Digital ED...

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