Help with choice of convertor.
I do have a Pentax 1.7X AF that I'm thinking of selling, if you're interested

Regards
David
Flickr
Nicola's Apartments, Kassiopi, Corfu
Some cameras, some lenses, some bits 'n' bobs
Optically it's one of the best I've used. It carries through the SDM focus (and will do screw drive on other lenses). It matches the DA* in WR (so assuming your DSLR is WR you have a complete outdoor weather solution). But it's a bit on the dear side.
The next closest match optically (IMO) is the Tamron-F 1.4X Pz-AF MC4. It doesn't have the WR, but it does do the SDM focus (and screw drive), although the Pentax has a slightly higher "hit rate" in lower light situations from my experience.
The Pentax F 1.7x AF Converter is optically very good, but will not give the same success rate as the other two.
I have all 3 TC's and would recommend either of the 1.4's to go with your lens, but for the reasons I mentioned I mainly use the WR Pentax.
And Yes, I do have my Tamron up for sale at present at about half the price of the Pentax WR, but that is not the reason I commented on this post

LennyBloke
Best regards, John
Thank you very much for the comments, the consensus certainly seems to be the new 1.4 is the one to go for - so that is what I will do.
Sorry I won't be taking up the offers in the posts.
Lots of gear - but not a lot of idea!
I have been on the same DA*300 TC journey myself - and having owned very TC known to man - the HD 1.4 to me is not just the best option, it is the only real option.
In case you are interested (or have found a better deal - in which case - let me know

Carl
No matter how many lenses I have owned - I have always needed just one more
Daronl
I actually spotted the SRS deal on the HD 1.4 rear convertor a couple of hours ago and placed the order.
Confirmation received that it's on it's way!
👍😊
Lots of gear - but not a lot of idea!
malfis
Member
Kineton, Warwickshire.
I've taken the plunge and bought a DA* 300mm lens to try to improve my results at bird photography.
It seems that convertor would be helpful, but I don't know what I should buy.
Should I stick to Pentax? If so, should it be the 'new' HD1.4, or are some of the older ones just as good?
Thank you in anticipation.
Lots of gear - but not a lot of idea!