Originally posted by kurrawinya My main bug bear is where to get them from! I know there are a few really dodgy sites around, and I absolutely don't trust ebay for anything more than a few bucks..... plus it's a nightmare to navigate lol, I've been snooping around Ted's and Pentax Australia so far.
As for
buying new, I agree with what Tas said. I've bought often from dcxpert and highly recommend them. (They aren't actually C R Kennedy, the official distributors for Pentax and Sigma, but they use CRK for fulfilment.)
Pentax Australia will price-match sale prices at Pentax US, so that is worth watching for.
To find the best prices on new lenses from online sellers, try one of these price comparison sites:
http://www.staticice.com.au http://www.shopbot.com.au
Buying
used lenses has its risks, particularly when you don't get a warranty.
Of course stores like Michael's and Camera Lane provide a warranty with used lenses, but there don't seem to be any stores in Australia that carry much second-hand Pentax stock, and what they have is often pricey.
C R Kennedy sometimes clear demo and excess stock through their ebay site (Survey Supplies) - there are excellent buys to be scored there, but you have to be lucky.
I've bought second-hand cameras, lenses and other photography gear from various private sellers: through the PF marketplace, ebay, Camera Market (
http://www.cameramarket.com.au/ ) and Gumtree and (touch wood) I've had a lot of good experiences. It's amazing what good gear you can get for reasonable prices if you are careful and patient. There are certainly risks, but in fact the only problem I've had was buying SD cards from an ebay retailer overseas - even then when they didn't arrive I complained to ebay resolution centre and got a full refund. It's worth paying with Paypal wherever possible because they also have a dispute resolution mechanism.
It's true that ebay searches are hit-and-miss because sellers describe items in different ways, and lenses turn up under "film cameras" or "digital cameras" as well as under "lenses". But if you know what you are looking for you can find most of that item - e.g. a search for "Pentax 18-135" will find most of the DA 18-135s for sale (albeit with some dross).
Gumtree (
http://www.gumtree.com.au ) is also worth searching. Sellers' descriptions are even more idiosyncratic than on ebay. I don't mind baleen feeding, so I tend to search for "Pentax" in all categories throughout Australia. That will typically turn up about 400-500 results. If you want a more targetted search it's still worth leaving it a little wide - e.g. "Pentax 135" or "Pentax 300" in the cameras category, rather than "Pentax 18-135" or "Pentax 55-300". Most sellers on Gumtree will ship their items, and most will accept payment by Paypal.
Buying from overseas was more viable when the $A was high a couple of years ago, but you are better off looking within Australia now.
Certainly damage in transit is a risk, but I have found that people will generally pack things carefully for postage - I've got stuff sent from the NT, Perth, northern NSW and from Brisbane without any issue. It's worth insisting on Express Post for the tracking - and it is only a little more expensive (about $15 for a satchel up to 3kg).
I've looked at some of your photos Pen and you've got a great eye. If your budget can run to DA* lenses, I think you could make them sing. The DA*60-250 is heavy (1100g), bulky and relatively expensive (about $A1350 new, about $A900 used), but it is made for tough conditions, has stellar image quality (that's what the star means) and those who have it regard it as one of the great Pentax lenses. See this review:
https://www.pentaxforums.com/reviews/pentax-da-60-250mm/introduction.html?src=lrdb
But if the budget won't go that far, the 18-135 and 55-300 combo mentioned above will do very well - I've got both and I can say that each is great value and can produce excellent results in the right hands. Each is a mile better than the kit lenses you have been using.
Only comment I'd add to those above is that if you are shooting at dawn and dusk, the extra speed of the DA*60-250 f4 (or perhaps even one of the 70-200 f2.8 lenses) would be a significant advantage over the DA 55-300 (which is only f5.6 from 200mm-275mm and f5.8 above 275mm).
Here is another out-there suggestion. Dust is the bane of DSLR cameras. Changing lenses always carries the risk of dust, no matter how careful you are. In the bush it's inescapable. That leads to two other thoughts.
First thought: maybe a superzoom lens (a zoom range greater than 10x) would suit your needs. One lens on the camera all the time. There are good 18-250 lenses from Tamron and Sigma in K-mount; the Tamron was also rebadged as the Pentax DA 18-250. There is also the Pentax DA 18-270 (another Tamron design) which is available new, and features silent autofocus. If you got the Pentax DA 18-250 or 18-270, your K-50 can apply in-camera correction of distortion and chromatic aberration to jpgs. None of these superzooms is weather or dust sealed, but at least you would minimise the opportunity for dust in the sensor - and you won't miss photo ops while changing lenses. The downsides of these lenses are that they are slow (ie widest aperture isn't very wide, like f6.3 at the long end) and the image quality - although better than the kit lenses - isn't quite as good as the 18-135 or 55-300.
Second thought. Consider getting a second camera body, so you can leave the wider zoom on one and the longer zoom on the other. That's what the pros do. A second-hand K-30, K-50 or (perhaps better still, because of its more rugged construction) a K-5 can now be bought cheaply. In fact you might find one bundled with a decent lens (like the 18-135 or 55-300) as well.
Good luck Pen.