For 2017, I want to document all my memorabilia and valuables (gold coins, rings) with my K7 and likely using my 30mm prime lens. I seek advice from all the sifus here on your experience and advice, before I start the project. With the photos, easier to put them together for the next generation, as to what to pass on. I have a photo tent which I bought, but I don't have any special light. I do have tripod and flash. Awaiting feedback from all the gurus.
I doubt you can do much with your 30mm.Is it the old pentax one or old sigma
version? It's basically the magnification ratio or plainly speaking how much
space the subject occupy a apsc frame.There are a few methods:
1. Reversing ring adapter where adapter screw into filter thread ring and
lens is in reverse.Good only for metal barrel lens but if plastic one may
strain or brake lens if heavy.Again I don't know how much the subject can
fill frame.Of course everything is manual.
2. Close up lens attachment, try +3/4 diopter screwed to lens filter
ring.This is the easiest way relatively cost effective but if you fussy about
image quality.Normally 49mm or 52mm but if larger may be difficult or non
existant item.
3. Macro lens, 50/55mm or longer depending on working distance.Extra cost.
4. A set of macro extension tubes manual or auto.Most probably get you the
magnification ratio required.Any "normal lens" will do or longer if adventurous.
Other than that lighting/exposure may have to experiment,trial n error.Please research online tutorials.
PS on camera flash may be impractical (coverage/blocking too near) so need to be off camera depending on flash and camera body capability or use wireless trigger.
Or table top lamps florescent/incandesant/halogen is possible with correct white balance.
You are not do pro work hor?