All Forum Comments
Comment by petrochemist posted on *istD comparable to? at 13/04/2016 - 16:21
Thanks George!
Hope you can make Oulton
Comment by petrochemist posted on FS K5ii £275 at 07/04/2016 - 13:37
If you do a 3rd edition could you add a table of the features supported by the different models?
It's obviously based around your hardware, but mostly very relevant to my hardware too.
A quick look up of my 360FGZ's limitations would be helpful, and such a table should be very useful to those in the market for a new flash.
Comment by petrochemist posted on Pentax Dedicated Flash Guide at 06/04/2016 - 12:07
The best attachment to a monopod will depend on your subjects.
Direct connection should be OK for cars but will be useless for BIF. Sideways movement is easily achieved by rotating the monopod.
I've seen some small units (just under the lens or body) that effectively act as a hinge allowing vertical movement, and I'd expect these to work OK if you need much vertical movement. They might be more difficult to get balanced than the gimbal type you linked to.
see:
Manfrotto tilt head or
Chinese version with QR
Personally I don't like a ball or 3 way heads on a monopod, though I've heard of some people liking these options.
Comment by petrochemist posted on DFA 150-450 - which support to use at 06/04/2016 - 11:20
Common sense tells me that if we have 1:1 with 35mm format and we change the sensor behind the lens we crop the image. Therefore, the magnification increases.
Magnification here is size of image on the sensor / subject size. The rules for enlargement with extension apply whatever format is used. I've seen this relationship described in large format books, where a !:1 macro of a rose can include the whole flower...
The final image might be bigger but applying the crop factor is effectively the same as printing a larger image. It's this sort of reasoning that manufacturers use to put 'macro' on zoom lenses that only reach 1/4 life size or less on the sensor.
Comment by petrochemist posted on Macro Reproduction Ratios on APSC. at 04/04/2016 - 22:57
Comment by petrochemist posted on FS K5ii £275 at 01/04/2016 - 08:25
I went to reset the time on my K-5 and Panasonic LX-7 on Sunday morning and low and behold they were already set to British Summer Time.
Something tells me I forgot to set them to GMT last October.......
It made tagging them considerably more laborious!
Comment by petrochemist posted on Summer time at 30/03/2016 - 16:46
I've managed to get a genuine Pentax M42 helicoid, but the K version is MUCH more useful..
Third party M42 ones are now quite common
Comment by petrochemist posted on A nice gift at 30/03/2016 - 16:42
No is the answer - an 18-55 lens is an 18-55 lens regardless of the camera, you will get a wider angle of view but as fatspider says the automatic crop will turn the K-1 into a 15MP APS-C camera with an APS-C lens attached, effectively making e.g. the 18-55 the equivalent of 27-82mm- the focal length does not change.
You are correct that the focal length doesn't change (the OP didn't suggest it did).
FOV for DA lenses will apparently be at the same crop factor if auto cropping is enabled, if autocrop is turned off it will depend on the crop given in post to deal with insufficent coverage of DA lenses. Some of the primes cover the full frame sensor, those that don't (and the zooms) will vary in how much they actually cover.
Older lenses such as the F series, A series... will give full coverage as well as the FA lenses.
Comment by petrochemist posted on None FA lenses on K-1 crop factor at 24/02/2016 - 16:15
Sometimes when I go out it's specifically to take photos, apart from lunchtimes & Monday nights with the club this tends to be fairly rare.
The emphasis on the two sorts of trip definitely varies - on a family walk I'm rarely allowed to stop for more than a minute or two, just for photos, on a photography trip there'll be time to set up a tripod & explore the angles...
There are of course other events that fall between the two - Such as local shows where I'll take loads of photos, but photography wasn't the only reason for going...
Comment by petrochemist posted on When you go out with your camera... at 23/02/2016 - 11:44


My own experience of Pentax vs Canon/Nikon is that the controls on Pentax seem better thought out, they fall more naturally to my fingers, and often involve less menu diving. This might be somewhat unfair though as it generally those with beginners CaNikon models that ask for help in finding features, while my recent Pentax cameras have been in the semi-pro class. It's a long time since I've used my K100d but IIRC it's ergonomics where also pretty good (certainly beating the likes of the 650D)
I suspect you'll find any modern Pentax has a large number of extra features, but will still feel quite familiar after even a very short while.