Friday 5th August 2011 – Clubnight

John had requested me by email if I would help clean his “mucky sensor” this evening.   He arrived with a Nikon and although I had forgotten to bring my magnifying loupe, we started on the task.  Firstly, the mirror showed a slight layer of dust buildup so I opted to use the Visible Dust Arctic Butterfly brush which generates static in the bristles by periodic spinning.  A couple of gentle swipes outwards, and it looked clear.

Cleaning of the mirror or the underside of the prism (to remove dust which is visible in the viewfinder) is a very delicate operation and is fraught with the danger of scratching the coating, to be seen forever.  John operated the command to raise the mirror to expose the sensor and first line of attack was using the Rocket blower with the camera inverted.  I asked him to reattach the lens, set to f22 and manual focus and go outside and take a photo of cloud or blue sky to help show up the location of dust spots.  By magnifying the resulting photo and/or viewing on the computer any spots will be revealed.  There were still some spots so we tried the Butterfly brush then finally the Pec-Pad with a spot of Eclipse cleaning fluid.  One careful light wipe should normally be enough.   Another photo and mission accomplished.

Meanwhile Jack arrived with a memory stick with his AV for the national competition called “All that Glisters”.   His final version was warmly commended and was really refined especially with Jack’s refined voice-over.  Well done Jack.   We couldn’t let him away without seeing again his famous work, “Droppy”.

Alli, Harry, Trevor also submitted photos on a stick for appraisal.

By request I showed a couple of my old AVs, A Taste of Venice and especially for Christine, Barcelona 2007.

I mentioned that the new season programme was almost ready for publication, meanwhile I will publish in this blog, the finalised dates for Competitions and NIPA Rounds.

Tomorrow was the last scheduled summer outing to Argory and Ardress House, both National Trust properties.   Hope the weather holds.

Feedback and comments in this blog would be appreciated.


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