All Forum Comments
Comment by petrochemist posted on Most boring job at 28/02/2012 - 17:16
I've no idea why but when mixing extension tubes and x2 converters I found that :-
Camera - x2 - tube - lens gave a different distance from camera to subject than
Camera - tube - x2 - lens
I've not been able to rationalise the maths though
regards
Bernard
Comment by petrochemist posted on Macro on the cheap (and suggestions for focus rail, please) at 27/02/2012 - 07:46
Yes, longer focal lengths give you a longer working distance, though require more work to get the same magnification.
If the macro teleconverter is similar to my two, (I have both 2x PK & 3x PKA versions) it's a useful addition to the macro amoury. It's basically a variable extension built into a teleconverter, giving a second focusing ring. It can be used in conjunction with your current extension tubes giving different effects depending which side of the TC you put them.
Comment by petrochemist posted on Macro on the cheap (and suggestions for focus rail, please) at 26/02/2012 - 23:12
When the lenses focusing is adjusted that (effectively) includes some extra internal extension, and so complicates matters. In most cases adding extension is exactly what the focusing mechanism does, but 'internal focusing' lenses are different hence the 'effectively'.
Comment by petrochemist posted on Macro on the cheap (and suggestions for focus rail, please) at 26/02/2012 - 22:53
I'd be tempted to crop 2-5 slightly. The majority of the background is nicely out of focus, but the left edge draws my eye slightly.
I think the last is my favorite, but I'd have been proud to have got any of them!
Comment by petrochemist posted on Early morning foxes at 23/02/2012 - 07:51
Thanks Mike, any particular make?
Coker's tip might well solve my problem anyway, (thanks Roger!) must make sure I remember it.
Comment by petrochemist posted on Pentax Auto Bellows & K5 advice needed at 20/02/2012 - 18:12
I have to use a short extension tube before the bellows to get them to fit.
Comment by petrochemist posted on Pentax Auto Bellows & K5 advice needed at 20/02/2012 - 17:11
expect the 645 lenses to go up... in value... if Pentax brings out a medium format sized k-01...
I imagine a bigger, chunkier k-01, weathersealed, packaged with your choice of K or 645 or 6x7 lens adaptors... with a large sensor that may wind up being cropped to fit image circle for the size lens you mount...
so a 40 mp sensor might give you 30 mp ff k mount... 22 mp aps-c kmount or 40 (or better) mp medium format...
and as I said.. seperate adaptors for each mount for the same medium format evil class body..
priced to compete with Canikon's ff offerings!
and yes an evf..
Pentax releases the Mother-of-all-Evil's!
Comment by petrochemist posted on Will K5 price be driven down by new mirrorless? at 16/02/2012 - 18:18
Sure doesn't everything sell for below the first announced RRP?
Comment by petrochemist posted on Will K5 price be driven down by new mirrorless? at 16/02/2012 - 15:34
It'd be interesting to hear what you bought (cameras and lenses) and why you moved on from them (when you have the time - it sounds like an opus) !
My own experience of the dark side is very limited, I believe CaNikon AF is better, but trying to help members of the local camera club find basic options in their menus does not tempt me to switch...
Comment by petrochemist posted on Can I come Home Please??? at 15/02/2012 - 17:52
I get quite dismayed when you ask someone what they do and they say they are 'only' a cleaner/barman/etc.
All jobs require doing and I think anyone who does a job (paid or unpaid) and does it with dedication and professionalism deserves the same respect, regardless of what the job entails.
In fact the weird thing in life is, the less I do the more I get paid!
Some people like undemanding jobs so they can use the time at work to think of other things - some such as barman/chashier for the social interaction it gives them. Others are less capable and might find those roles quite demanding, they probably wouldn't describe their job as only...
I think most of us can also think of jobs where society might be better of if they weren't being done! (I guess the list here will depend on a persons veiwpoint)