Richard Schätzl <Richard.Schaetzl@xxxxxxxxxxxxxxxxxxxx> replied to what
>PCA Cala wrote:
>>
>> Hi Felix:
>>
>> > Sounds like what you need is a center gradient neutral tint
>> > filter.
>>
>> Good try, but they aren't available in 72 mm filter threads. If they
were,
>> they would run about $300US +
>
>But they are avaible in 77mm thread. :-) From Soligor at 190,- DM ~ US$
>100.
>
>Richard
Yes, the center filters are available in 77mm, and prices range from $US150
to $US500. One of the tricks astrophotographers use for odd-sized filters
is purchase the next size larger for what you need, and a plain, cheap UV or
skylight that is the right size. Have the needed filter trimmed to the
right size (a shop that does stained glass is reportedly a good place to
take them) and fit into the UV cell. Voila! 72mm center grad filter.
John P
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