K10D , manual lens and macro.

Hi all,
hope that this is the correct forum apologies if not and please move if needed.
I bought a K10D about 5 yrs ago to get into the digital arena but have only ever used it for holiday snaps etc 2694 shutter activations,hardly prolific!! Since retiring I would like to get 'into photography'and am fascinated by the macro shots that some of you take.Below is a list of my lenses ,some from many years ago. So to my question, which of them can be used and which would be best to use for macro work with the K10 (can't afford the K3-yet!)?
smc Pentax-m 1:3.5 135mm
smc Pentax-m 1:2.8 28mm
smc Pentax-m 1:1.7 50mm
smc Pentax DA 1:3.5-5.6 18-55mm (kit lens from the K10)
Miranda 1:3.5-4.8 MC macro 35-70mm (from an old Chinon camera I used to own)
Tamron Aspherical DiII AF 18-250mm (I bought this a couple of years ago for a holiday lens)

I also have Vivitar MC Tele converter 2x-22

I have just sent off for, but not arrived yet, a set of Pentax auto extension tubes. I am aware of and have read about the use of manual m lenses with extension tubes but my question is about those specific lenses and the x2 converter.
Sorry for the length of this post.
Regards
David

Nass is very good with macro https://www.pentaxuser.com/user/nass-9403/activity

With what you have already I'd mount the primes on the teleconvertor and see what you get.

You might need to put the K10D into Manual Focus, and dial into Manual mode.

You can either set the exposure and aperture (on the lens) manually ....or press the green button (on back) and the camera should meter the scene and set the shutter speed.

When you get the tubes, check the paint and if you need to , scratch a little off https://www.pentaxuser.com/forum/topic/tamron-macro-90mm-not-working-with-macro-...#comm54645

I think you'll get best results with the 50mm and 135mm primes on tubes.

You can make a light guide with a pringles(own brand) tube to direct the on board flash onto your subject or get a cheap manual flash like the Pentax AF200T which apparently has prety decent control over the power. There are other manual flashes out there too.

After you've done that, try reversing the primes on the front of the other primes. You can get reversing rings occasionally here or on ebay.

The M 1:3.5 135mm works well with a Raynox clip-on macro attachment. I use the DCR-150 which gives a working distance of about 7" and is easy to work with - especially with flash, the DCR-250 will magnify more but will give a correspondingly closer working distance and be harder to use.

If you're not familiar with Raynox lenses, they're a bit more than a magnifying glass, being fully corrected glass. The only real downside (as with extension tubes) is there being only 1 working distance and 1 magnification factor using primes, a zoom gives more flexibilty but optically decent zooms usually have too big a filter size for a Raynox to clip onto, the kit lens would be OK though, probably your Tamron as well as it fits my Tamron 70-300.

Thank you both very much for your replies and for the links Doug. Very interesting.I will be researching the Raynox lenses and clip on attachments, I've never heard of them before. With regard to the manual flash, I have a couple of flash guns from several years ago but I have been very wary of putting them on the K10 as I thought there were potential power issues that could damage the camera? More research required!!
I also have in my bag a collection of Cokin filters one of which is a close up lens. I will have to experiment and see if I can utilise this in some way.