Sort:  

Thanks. In a large telescope the moon is so bright that a single look causes pain. The filter is then very necessary.

You mentioned polarizations filter as ND, are there any problems with X artefact (some photo guys hate them)

The filters I described in use for visual observations. There are no artefacts in visual observations. Photographing through a telescope using filters is a more complicated topic.

Coin Marketplace

STEEM 0.29
TRX 0.12
JST 0.032
BTC 60180.31
ETH 3001.45
USDT 1.00
SBD 3.64