70-200+TC17EII softness problem investigated

Started Oct 7, 2005 | Discussions thread
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keegan Junior Member • Posts: 28
70-200+TC17EII softness problem investigated

I have noticed this lens combination on my D70 is soft and ghosty at full zoom when wide open, as first discussed in this thread over at nikonians:

http://www.nikonians.org/cgi-bin/dcforum/dcboard.cgi?az=read_count&om=7518&forum=DCForumID6

I took the time to do some tests and found that this problem can be solved by backing off the zoom a bit, stopping down the lens from wide open at F/4.8 to F/6.3, or a combination of the two (back of the zoom just a tad, and stop down to F/5). My results are posted here:

http://zaps21.com/photo/TC17tests/TC17tests.htm

Anyone else find this with this lens combo?

cheers,
keegan
--
http://www.zaps21.com
http://www.pbase.com/zaps21
D70, 18-70, 50 1.8, 70-200VR, 1.7TC
RRS BH-25 head on Gitzo 1127
wish list: 12-24, 105 micro, 300 2.8

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