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Full Frame Telephoto Zoom

davidstorm
Posted 20/10/2021 - 19:14 Link
Hi All

I've just acquired another K-1 Mk1 (have 2 now), so am thinking about ditching all my APS-C kit, including all of my APS-C lenses. This leaves me with a slight issue in that I will be lacking a high quality full-frame telephoto zoom lens, something in the region of the 70-300mm focal range. I have a Tamron Di LD 70-300, which for what it is (a cheap lens) performs miracles, but does suffer from the dreaded purple fringing and the max aperture is not very wide. I also have a Pentax 80-320, which I do like very much, but again it's not the last word in IQ.

Can anyone suggest for me please what lenses I may be able to find that will better my two existing telephoto zooms for image quality and max aperture, and will work at all focal lengths on a K-1 without vignetting.

Thanks in advance for your advice and suggestions.

Kind Regards
David
Flickr

Nicola's Apartments, Kassiopi, Corfu

Some cameras, some lenses, some bits 'n' bobs
prsjnb
Posted 20/10/2021 - 20:16 Link
Sigma 100-300mm f/4.0 APO EX DG (mark 2 version) which performs very well with the matched, 1.4X APO DG teleconverter. These do come up in PKA mount from time-to-time, but tend to sell quickly. I've had one from new and it'll probably be interred with me

Tamron 70-200mm F2.8 Di LD Macro - far easier to find than the above and can be had in excellent condition, even from dealerships and with a warranty (my copy came from Ffordes) for under 300.00. Don't believe everything you read about the AF performance of the Tamron. Whilst not whippet-like, neither is it sloth-like. Sharpness and contrast increase dramatically above f/2.8. Has excellent close-focus capability. See also link

Happy hunting
pschlute
Posted 20/10/2021 - 20:58 Link
Pentax 150-450 zoom.

Simply no question.
Defragged
Posted 20/10/2021 - 21:08 Link
The Pentax DA 55-300 old version performs remarkably well on the K1, is readily available, relatively inexpensive, lightweight and compact for travelling. Yes it's still APCS an you do get a bit of vignetting but nothing so serious that can't be lived with or rectified in post.
If max aperture is really criitcal to you then maybe the Sigma 100-300 as has been suggested but even that only has a max aperture of F4, is not cheap and somwhat heavy. F2.8 limits one very much to a 70-200. For a good alround general purpose though I still reckon the Da green band 55-300 is a good option to consider.

Just a thought.
C.O.L.B.A.S victim
(Compulsive Obsessive Lens Buying Addiction Syndrome)

What you need are lenses, more lenses, bigger lenses, better lenses, faster lenses, vintage lenses and when you have these, your pictures will be perfect!
Edited by Defragged: 20/10/2021 - 21:12
davidstorm
Posted 20/10/2021 - 21:33 Link
pschlute wrote:
Pentax 150-450 zoom.

Simply no question.

Hi Peter, I'm not looking for something as large, heavy and expensive as this. I have a DA*300, which I love and will never sell, also a 1.4 TC, so this is my go-to wildlife setup. The 150-450 is definitely not what I'm looking for.

Kind Regards
David
Flickr

Nicola's Apartments, Kassiopi, Corfu

Some cameras, some lenses, some bits 'n' bobs
davidstorm
Posted 20/10/2021 - 21:35 Link
Defragged wrote:
The Pentax DA 55-300 old version performs remarkably well on the K1, is readily available, relatively inexpensive, lightweight and compact for travelling. Yes it's still APCS an you do get a bit of vignetting but nothing so serious that can't be lived with or rectified in post.
If max aperture is really criitcal to you then maybe the Sigma 100-300 as has been suggested but even that only has a max aperture of F4, is not cheap and somwhat heavy. F2.8 limits one very much to a 70-200. For a good alround general purpose though I still reckon the Da green band 55-300 is a good option to consider.

Just a thought.

Thanks Defragged, I have owned several 55-300 lenses and this is not one I would consider, I want one that has no compromises on full frame, i.e. no vignetting. I prefer my 80-320 to the 55-300.

Kind Regards
David
Flickr

Nicola's Apartments, Kassiopi, Corfu

Some cameras, some lenses, some bits 'n' bobs
HarisF1
Posted 20/10/2021 - 23:18 Link
DA* 60-250 is worth a shout if found cheap enough. Once the baffle is removed it's near perfect in FF mode.
All the gear with no idea
davidwozhere
Posted 21/10/2021 - 00:19 Link
You don't really need AF - assuming your subjects are not moving. There are dozens of top quality vintage offerings out there going for peanuts.
Both the *istDS and the K5 are incurably addicted to old glass

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Pwynnej
Posted 21/10/2021 - 08:37 Link
Defragged wrote:

If max aperture is really criitcal to you then maybe the Sigma 100-300 as has been suggested but even that only has a max aperture of F4, is not cheap and somwhat heavy.

I second the Sigma 100-300. Super lens. Got rid of mine as at 2010 I was going the other way thinking Pentax wouldn't go FF and sold my Sigma 70-200 and 100-300 to get the DA*60-250. The longest focal length I have now, since I only have film and K-1, is 200 mm (D-FA* 70-200).
Z-1p, K-1, P50
F50 1.7. SMC-FAs 24, 35, 50 1.4, 85, 135. HD-FA15-30, DFA24-70, D-FA*70-200. The SMC-FA Limited Trinity.
Metz 45 CL-4, AF500FTZ. AF540FGZ.
Some Mamiya and some Nikon
Posted 21/10/2021 - 16:04 Link
I have a Sigma 100-300mm f/4.0 APO EX DG (mark 2 version) which I bought off a forum member a few years ago. It came without a case so I bought one, put a UV filter on and put it away. I have never actually taken it out or used it other than to check it worked by snapping a neighbour's aerial when it arrived. I've cut down on my Pentax gear and sold a few lenses to other forum members. PM me if you're interested

Barry
davidstorm
Posted 22/10/2021 - 14:33 Link
Thanks to everyone for the suggestions, I've now managed to source a suitable lens, which is one of those suggested in the replies.

Kind Regards
David
Flickr

Nicola's Apartments, Kassiopi, Corfu

Some cameras, some lenses, some bits 'n' bobs
cardiffgareth
Posted 24/10/2021 - 11:30 Link
No suggestions for the DA* 60-250mm. Rear baffle removal is dead easy to do, even I managed it and a great telephoto that's weather sealed also.
Gareth Williams ARPS

My outfit: K1ii - Pentax D FA 24-70mm f2.8 - Pentax DA* 300mm f4 - Pentax modified DA* 60-250mm f4 - Irix 15mm Firefly - Pentax FA 35mm - FA 50mm f1.4 - Tamron SP 90mm macro - Pentax AF 540 FGZ II

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HarisF1
Posted 24/10/2021 - 14:13 Link
cardiffgareth wrote:
No suggestions for the DA* 60-250mm. Rear baffle removal is dead easy to do, even I managed it and a great telephoto that's weather sealed also.

HarisF1 wrote:
DA* 60-250 is worth a shout if found cheap enough. Once the baffle is removed it's near perfect in FF mode.

All the gear with no idea
cardiffgareth
Posted 24/10/2021 - 14:16 Link
HarisF1 wrote:
cardiffgareth wrote:
No suggestions for the DA* 60-250mm. Rear baffle removal is dead easy to do, even I managed it and a great telephoto that's weather sealed also.

HarisF1 wrote:
DA* 60-250 is worth a shout if found cheap enough. Once the baffle is removed it's near perfect in FF mode.




Missed that, brain fog and Covid, that's what I'm blaming it on
Gareth Williams ARPS

My outfit: K1ii - Pentax D FA 24-70mm f2.8 - Pentax DA* 300mm f4 - Pentax modified DA* 60-250mm f4 - Irix 15mm Firefly - Pentax FA 35mm - FA 50mm f1.4 - Tamron SP 90mm macro - Pentax AF 540 FGZ II

Welsh Photographer
Flickr
Instagram
My PPG
Foundation NFT
Defragged
Posted 24/10/2021 - 14:35 Link
Worry not Gareth, we're probably all guilty at some point of looking and not seeing...lol
C.O.L.B.A.S victim
(Compulsive Obsessive Lens Buying Addiction Syndrome)

What you need are lenses, more lenses, bigger lenses, better lenses, faster lenses, vintage lenses and when you have these, your pictures will be perfect!

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