Comments made by dcweather - Page 97

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But surely the SR requires a focal length input only to calculate the approx magnification and hence the shake? This would be more with extension tubes, teleconverters etc so why isn't more SR needed in the algorithm calculation when they are added?
Dave

Comment by dcweather posted on Shake reduction and focal length at 02/10/2011 - 21:36

It is true about DOF with the Raynox -250 and to a lesser extent with the 150. The results are surprisingly good though and it's certainly practical taking just a few seconds to whack it on or off.

Comment by dcweather posted on Macro: Extension tubes/bellows/closeup lens at 02/10/2011 - 21:24

Some very good points there and I imagine that is the way it is.

Comment by dcweather posted on Tamron 200-500mm at 10/09/2011 - 23:24

I guess you probably have read these already:-
http://www.adaptall-2.org/

http://forum.mflenses.com/tamron-adaptamatic-300-5-6-my-last-adaptamatic-t14537....

Looks good.

There is an adapter on Ebay for Konica so I guess just keep searching and see if a Pentax one comes up.

Comment by dcweather posted on Old Tamron Adaptamatic 300mm Model 670AU at 09/09/2011 - 23:41

It's hard to estimate the economics of it but you would think with all the overhead costs of research and manufacture of the optics already taken care of, fitting a PK mount which they have experience of, would easily be covered by the number of extra sales. Perhaps their market research shows otherwise.

Comment by dcweather posted on Tamron 200-500mm at 09/09/2011 - 23:22

I've tried a load of Tamron Adaptalls and have found them great, even the non-SP's can be good. The 103A 80-210 is great and light and has good macro. I agree about the 19AH - very highly rated in this quarter as well

Comment by dcweather posted on older zooms at 09/09/2011 - 21:13

I wonder if Tamron have any intention of releasing the 200-500mm SP in Pentax mount? I mean they do several other lenses in PK. I saw someone with it today and it is considerably smaller and lighter than the big Sigma 500mm zooms. It costs about £675 and seems to get good reviews. Doesn't have OS but that's not a problem for us.

Comment by dcweather posted on Tamron 200-500mm at 09/09/2011 - 21:05

Thanks for the advice. I have previously made a claim on my house insurance when I dropped my camera on the kitchen floor. It wasn't clear (AXA) exactly what was covered but I think I need their personal items cover as well to be covered when travelling etc. Incidentally, you do have to be careful when only partially covering equipment or you may find you will only be paid out in proportion to the total value you had, unless each item is insured individually.

Comment by dcweather posted on Equipment Insurance ? at 02/09/2011 - 01:19

I am thinking of insuring my equipment as it seems cheaper than I thought. I know my household insurance gives me some cover but i want something more extensive for an amateur. I found E&L insurance for 2.5K cover for about £6 per month. I notice it doesn't cover losing items. Is this usual - I am a bit concerned about leaving a lens or something in a hide.

Comment by dcweather posted on Equipment Insurance ? at 31/08/2011 - 20:48

I got a cheap Chinese adaptor off eBay and it's fine. I'm sitting here wondering why I didn't just get a spare battery though

Comment by dcweather posted on Adaptor and AA cells for Pentax Kr are they worth getting. at 31/08/2011 - 20:39

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