I found another thing to let go and this is the hardly used 3x Televue barlow. Nowadays, the planetary cameras have small pixels so I don't need the 3x barlow to reach the optimal sampling.
At the very edges of the field lens of the barlow, there are some smudges which I also don't know why but it will not affect any visual or photographic usage. So this barlow is going for $100.
I can meet at mrt stations especially at the north and west side.
Meng Lee
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