I like my Tamron for the most part but I like my new to me DA L 55 - 300 mm more
my long lenses options:
Tamron 4-5.6 70 -300 macro zoom ld [1:2] af 62 f
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Vivitar Series 1 3.5 200 mm prime af in lens 67 f (Cosina)
Vivitar Series 1 2.8-4.0 70 - 210 mm macro zoom [1:25] mf 62 f ( ver. 3 ), Kosine)
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smc Pentax DA L 4-5.6 50-200mm wr ed zoom 49 f
SMC Pentax-DA L F4-5.8 55-300mm ED 58 f
HD Pentax-D FA F4.5 - 5.6 150-450mm ED DC AW 86 f
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HD Pentax -DA af rear converter 1.4 AW
I have legacy lens, lenses I have bought "experienced" and new
I very rarely use the Vivitars and very rarely use the rear converter with any lens but it is there if needed.
IMHO, YMMV, you don't need new lenses if there is no " real " difference between the experienced ones and the new one
what is a " real " difference - ah that is a very individual decision based on $ and the different features you want or need, sometimes it is a trade off between $ and features
I have had very good experiences dealing in the forum's market place and I am lucky enough to live in the US where I can rent equipment for a "try out". Very important since I don't have a "brick and mortar" store to physically examine pentax equipment
I recently discovered that KEH.com offers a 14 day return on equipment:
What is the return policy for KEH?
Effective Feb 18, 2016
At KEH it’s our goal to ensure your 100% satisfaction. If you are not satisfied with your purchase, you can return or exchange it to KEH within 14 days of delivery for a full refund. Drones are excluded from 14-day return policy.
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take a look at these threads to see examples:
https://www.pentaxforums.com/forums/122-lens-clubs/294721-post-your-hd-penta...-pictures.html https://www.pentaxforums.com/forums/122-lens-clubs/55946-300mm-plus-lens-clu...ng-lenses.html
ask questions there as well