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Rust on the LOMO SF-50?

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Topic review

Expand view Topic review: Rust on the LOMO SF-50?

Post by Jne_K on Thu Jan 08, 2009 8:03 am

Please give us a call to process a replacement. No excuse for getting one with rust.

Rust on the LOMO SF-50?

Post by Jca245 on Wed Jan 07, 2009 8:15 am

I recently ordered and received a LOMO SF-50 unit this week. I am happy with the overall quality and performance of the unit considering the cost. My question is if anyone who also ordered this unit found rust anywhere on it when unpacking? I noticed that on the bottom of the binocular head, where the 2 lens apertures were, there was some pretty severe rust on the metal lens retaining rings. I used to live near the ocean and the rust looked like what I saw on metal in saltwater, orange and yellow colored. I also noticed what looked like a small amount of salt residue in the eye width adjustment opening that the upper lens tubes move in. This does not seem to affect the mechanical operation or the viewing quality but I was concerned about mechanical failure. I was thinking if putting a drop of rust prevention chemical or trying to mechanically clean the unit but I do not know if I will do any damage given the proximity of the lenses.

Another issue is with the camera adaptor unit. The small metal leaver that moves the prisms in and out of the light path seems very difficult to move. It almost feels like it is bending a bit before the two lenses will actually move. Is there an adjustment or a way to lube the movement to avoid stress breaking the leaver?

Does anyone have any suggestions?

The unit Optical quality is, IMHO very good and I will enjoy using this unit. I plan on using it to do very small carvings and sculptures as well as small object examination and inspecting. I would highly recommend it. The long working distance under the unit is a plus for getting tools in there. The light projector is works, but doesn’t seem to center up properly. It is useable but I plan on purchasing an aftermarket LED light source with better adjustments one day so I will use it till then.

Thank you for your assistance.

Kingsport, TN