Pixels or Glass?
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Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver
I would say get a k3 then look at the macro options, some as follows
1. Get Sigma 50mm f2.8 mf macro for around £50 then some tubes for around £10
2. Get a Sigma or Tamron 70-300 part macro jobbie for around £50
3. Choose from many sub £200 macros and enjoy

I may well have left some options out

cheers
stu
I would suggest for you a K-5 II or IIs, the 55-300mm Pentax lens and save up any change for your next lens.
This would keep all your accessories and the handling the same as you have now and update your lens selection as well. Your tripod is already a very sound choice.
Best regards, John
I found the K-5 a vast improvement in poor light.
I would suggest a K-5II (S or not) [2nd hand] and spend on glass as well.
You will see an improvement over the K-7. I'll probably see what comes after the K-3 or creep up to the K-5IIS.
You can pick up a decent 1:1 macro like the Sigma 105 or Tamron 90 for just about £200. One of the Pentax 100mm will cost more £300+/- and as other have said the 50mm Sigma and Pentax and 70mm Tamron.
Or scour eBay and beyond for the more exotic pleasures of
Sigma 90mm MF,
Kiron 105mm MF,
Vivitar 90mm MF, or Vivitar 55mm MF.
The plastic cream in a yogurt cup, Vivitar/Cosina/Pentax 100mm 3.5 MF or AF.
Lurking is shirking.!
Firstly, if you are simply wanting more magnification and close-up shots, my first suggestion would be extension tubes and a quality 50mm lens, like the Pentax-A 50mm F1.7 for example, which took this image on the end of a full set of tubes:

Secondly, you won't be any better off with a K-3 than with a K-7, unless you have the glass to back it up. My first significant purchase if I were in your position would be to buy a Pentax 100mm F2.8 macro, either the WR or the non WR version (non WR has an aperture ring, the WR doesn't).
Once you have the glass and you've perfected your technique, the K-3 would be a good buy, as would a K-5IIs, both are superb for macro photography.
Hope this helps.
Regards
David
Flickr
Nicola's Apartments, Kassiopi, Corfu
Some cameras, some lenses, some bits 'n' bobs
My favourite lens for flower close ups is the 55-300mm. It enables frame filling close ups even when plants are at the back of large borders. The bokeh is beautiful and the crispness excellent at f/11 or f/16, ideal apertures for flower photography. It goes without saying that for this a tripod and a calm day are both essential.
I would suggest for you a K-5 II or IIs, the 55-300mm Pentax lens and save up any change for your next lens.
This would keep all your accessories and the handling the same as you have now and update your lens selection as well. Your tripod is already a very sound choice.
I strongly disagree with this John, there are many better lenses than the 55-300 for flower and insect photography. It simply does not get close enough and the bokeh is messy in comparison to many other lenses. A Sigma 105 macro or a Pentax 100 macro will both be much better for this type of image and both have better bokeh.
Regards
David
Flickr
Nicola's Apartments, Kassiopi, Corfu
Some cameras, some lenses, some bits 'n' bobs
You can see some of my photos here if you are so inclined
Tim
Some of my vaguely better stuff
It all depends on what type of flower photography you do. As regards bokeh, at say 300mm the bokeh of the 55-300mm is actually very smooth.
If something else works for you that's fine, but there is always more than one viable approach.
Best regards, John
Regards
David
Flickr
Nicola's Apartments, Kassiopi, Corfu
Some cameras, some lenses, some bits 'n' bobs
Its glass glass glass - the marketing machine makes it hard to resist but try your hardest its all about glass, not MP.
An example, went into the O2 shop yesterday to inspect the new model of my Sony phone, they had boosted it to 20mp and have added a feature called 'Blur Background' or something... basically you select the focus object and it takes 2 shots, one on the subject the other on something else and combines them to give you a 'photo-shopped' DOF BOKEH field. Result = garbage. Better of with a cheap fast fifty off ebay and a real camera. Nothing beats good glass, yet anyway
My fav flower lens is actually a M42 135mm Carl Zeiss Jena I got in a charity shop - tricky to use but tremendous rendering with real character - kinda hard to explain

If you want to play with macro get some decent M, A, FA glass that will still be useful and worth what you paid when the blip is over

BTW I know nothing but I don't allow that to get in the way of a good opinion.

Steve
Sometimes I'm serious and sometimes not, but I consider sarcasm an artform. Which is it today?

Cheers
David
Flickr
Nicola's Apartments, Kassiopi, Corfu
Some cameras, some lenses, some bits 'n' bobs
McGregNi
Member
Surrey, England
Here's the issue ... taking close-ups of flowers back in spring, I was pleased with the results, but I don't have a macro lens, not even a 1:2 (which would be enough). My telephotos will not focus very closely, leaving my subject occupying only 20-40% of the frame in many cases. Cropping in is very effective, and the K7 performed admirably. But there's a limit ...
Hypothetically this is - say I could spend the money, around £900. I don't know what lenses, but I'm thinking this could buy a couple of much better choices for close-up work (not necessarily true macro, just better close focussing and IQ generally). So any suggestions gladly received.
But the money could buy a K3. Thats an increase from 14.5mp to 24mp, plus other IQ improvements also. Now, limiting it just to image quality for close-up shots (I know the K3 will bring plenty of other benefits as well, but lets discount that for now), where do you think the money would be best spent?
Will I get better images with new, close focussing glass, giving me bigger subjects on the K7 .... or will I be better with the K3, the same lenses keeping the subjects smaller and just crop in with all those 24mp?
Be grateful for your thoughts
Thanks, Nigel
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver