All Forum Comments
Comment by petrochemist posted on What's your latest acquisition? at 22/04/2019 - 11:03
Admittedly it's not a top quality job, but it should provide a few components to play with. I might even replace the eyepiece holder with a connector for a M42 helicoid
Comment by petrochemist posted on What's your latest acquisition? at 12/04/2019 - 20:18
1. Correct
2. Pointclear
3. Correct
4. Same as number 2 just a different direction
5. Correct
6. Cudmore Grove country park
Thanks to everyone for their comments.
Although Cudmore Grove is only about a mile from point clear, it's quit a long drive round - over 20 miles. Did you take the passenger ferry ? I've never been on it myself
Shame I wasn't around to offer you hospitality, I was in Lincolnshire testing kart fuel that weekend.
Comment by petrochemist posted on A few days in Essex at 08/04/2019 - 13:39
No 1 is easy, from Coast road West Mersea around 100m east of the Victory.
No 2 feels like a view from Batesmans Tower at Brightlingsea. I've shot similar sunsets there recently, but without the trimaran.
No 3 must be be the Martello tower at Jaywick (it's the only one I remember with the banking round it)
I can't place No 4 - I suspect its a bit further down the coast. there are features that make me think Brightlingsea, but the houses are wrong.
No 5 is just 10 minutes away from me now the leading lights at Dovercourt beach
Sorry no 6 is beyond me, a common sight in my parents garden, but I doubt that's where you took it!
How did I do?
Comment by petrochemist posted on A few days in Essex at 02/04/2019 - 14:01
They might do, but is it a bad thing?
For most focal lengths Pentax have the lens model you'll ever want, and without the fear your lens will need to be sent for modification (ie K-1 lens mount or firmware update which makes 3rd party lenses inoperable).
The second reason is why I have either Pentax or Nikon branded lenses for my cameras.
More options is always good, and having the major 3rd party suppliers drop them will discourage new uses from going for Pentax.
Comment by petrochemist posted on Telephoto lenses at 04/02/2019 - 11:21
Since I'm our club's treasurer, If I walked out he wouldn't have been paid for his visit - seems about right
Comment by petrochemist posted on Club photographers at 08/12/2018 - 20:59
I'm not sure the results are worth the level of work involved, but I guess photoshop probably has easy ways of doing this...
Could this effect be made by using multiple exposures?
Comment by petrochemist posted on I saw this on another forum at 24/11/2018 - 20:03
It seems even on a fine day like this one my house is hidden by one of the thickest portions of cloud. It's under there somewhere in your 3rd photo.
Nice images, TFS
Comment by petrochemist posted on From a plane.... at 19/11/2018 - 16:21
Older lenses are often marked in cm or inches. Using the base unit of the meter would give us nasty decimals for nearly all lenses. (Less than 1% om my 'lenses' have round figure focal lengths in meters, both of these are actually telescopes one 1m-4m with the eyepiece & the other fixed at 1m without an eyepiece).
Preferred multipliers are multiples of 1000, giving us:
Kilo, Mega, Giga, Terra, Penta... going up
& milli, micro, nano, pico, femto... going down.
Comment by petrochemist posted on Why millimetres? at 29/10/2018 - 18:00
It's very much better than the old one I have somewhere.
Thanks a lot David!
Comment by petrochemist posted on FS various items at silly prices(!) at 10/10/2018 - 13:06


Won on a well known internet auction a Sigma 24-70mm. In the listings the images showed the lens hood attached but when it arrived there was no lens hood. Annoying as I've now messaged the seller 3 times and they haven't responded to them