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05-11-2012, 02:28 PM   #1
New Member

Join Date: May 2012
Location: Aberdeenshire, Scotland
Posts: 13
Returning oldie

I have been researching Pentax digital cameras recently and this site kept popping up during my internet searches. It's an excellent online resource.

I was a keen amateur photographer in the early-mid 1980s and acquired the following during the period 1981 - 84...

ME Super and MX

SMC-M lenses:
28mm f2.8
50mm f1.7
120mm f2.8
200mm f4
80-200mm f4.5

Vivitar MC lenses:
17mm f3.5
400mm f5.6

Tamron Adaptall 2 SP
35-80mm f2.8-3.8

Olympus Trip

I also owned a fair bit of Mamiya 645 equipment, but alas had to sell it. I never owned a true macro lens but had good results with a Panagor Auto Macro Converter, which gave 1:1 with my 50mm lens. None of the above has been used for 20 years but the lenses are optically in excellent condition, with just a bit of external wear, e.g. on the aperture rings. Having used only digital compact cameras in recent years (currently Canon A710 IS) I now have a hankering to get back into ‘serious’ photography and I am considering the K-5 body with a wide to telephoto zoom. I'm tempted by the Pentax 18-135, which would give me approximately 27-205mm in 35mm format (I still think in 'old money'). I could then use the SMC-M 200mm (300mm) and Vivitar 400mm (600mm) for wildlife shots and add a Tokina or Vivitar Series 1 or Kiron or SMC-M macro lens. I have not considered bodies from other manufacturers because I’m a Pentax fan and I have several K-mount lenses that I’m looking forward to using again after all these years. I'd appreciate some input please on the following:

1. Pentax 18-135 or Sigma 18-125 or something else? Reviews of the Pentax lens talk about distortion and colour fringing and the Sigma also has faults. Is either of these good enough for high quality landscape shots?
2. Am I right in thinking that a lens giving 1:0.5 on 35mm format will produce roughly 1:0.75 on the K-5 APS-C 23.6 x 15.7mm sensor?
3. I am a huge fan of SMC-M lenses. Can the SMC-M 100mm f4 Macro compete with the others listed above?
4. Bokeh? I have figured out what it means but where did the term come from? I thought I had a fairly comprehensive knowledge of photography but I had never seen this term until I started my internet search several days ago. I have never seen this used as a way of grading or comparing lenses.
5. What is the best way of digitizing several thousand Kodachrome 64 transparencies?

Last edited by Parallax; 05-11-2012 at 02:33 PM.
05-11-2012, 03:28 PM   #2
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eaglem's Avatar

Join Date: Feb 2009
Location: Perth Western Australia
Photos: Gallery
Posts: 27,650
Welcome to the forum, I'm sure if you browse around you'll find the right sections of the forum to pose your questions and get the answers you need.
05-11-2012, 04:33 PM   #3
New Member

Join Date: May 2012
Location: Aberdeenshire, Scotland
Posts: 13
Original Poster
Thanks for the welcome Eaglem. I guess I did try to cram a lot into my first post. I will look for answers in specific areas of the site as you suggest.

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