Baader 75mm DERF

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marktownley
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Baader 75mm DERF

Post by marktownley » Thu Aug 01, 2019 8:23 am

For sale is my 75mm Baader DERF. The item is in excellent condition and is for sale as i've just not used it for many years, it used to sit as a full aperture ERF on a 70mm PST mod. It comes in a homemade acrylic 'sandwich' cell where it is tilted to throw reflections, in the cell it has a clear aperture of 70mm. The cell perimeter is coated with tape (to hold cell together) but also as this was used to bring to a cell diameter of 88mm to allow an interference fit in the dew shield it was used in. The ERF can easily be removed from the cell (by taking the tape off), or the diameter could be reduced down to 84mm by removing some tape, or the outer diameter could be increased by adding more tape to allow fit in a larger tube or dew shield.

Price £150 £5 P&P UK, rest of world P&P price based on destination
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Ruler not included, only for scale!
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marktownley
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Re: Baader 75mm DERF

Post by marktownley » Sat Aug 10, 2019 3:41 pm

Provisionally sold
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Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

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marktownley
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Re: Baader 75mm DERF

Post by marktownley » Thu Aug 15, 2019 10:07 pm

SOLD
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http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

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