[dave9t5]

[quote name='joachim' timestamp='1339346906' post='18828']

Hi,



I noticed this morning that I have a piece of dust caked to filters in front of the sensor of my E-P1, which affects image quality from f/7.1 in critical images. With a hurricane blower I could remove some of the dust pieces, but the worst offender is still solidly caked to the filter assembly <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/sad.gif' class='bbc_emoticon' alt='' />



Anyone experience on what to do?

Some of the products seem to come in sizes for 1x, 1.3x and 1.6x sensors. I understand in that terminology the µFT is a 2.0x sensor.



Thanks in advance

Joachim

[/quote]



See here:

http://www.visibledust.com/sensorsizes.php

http://www.visibledust.com/ProdRec_975x300.php#13xsize



The swabs for the larger sensors (actually cleaning the low-pass filter) should work on the µFT sensors, just need to swab up/down instead of left/right!



APS-H sensor: 28.7 x 19mm

APS-C sensor: 23.6 x 15.7mm or 22.4 x 14.8 mm

µFT sensor: 17.3 x 13mm



VisibleDust recommends the 1.3x/20mm swab for most µFT (including Oly EP-1) and the 1.6x/16mm swab for some other µFT. (I suppose the low-pass filter is slightly bigger than the sensor itself on some models.) In any case, the smaller 16mm swabs should fit.