Visit MPB Visit MPB Visit MPB

Best T/C for Sigma 100-300mm f4?

cardiffgareth
Posted 18/01/2021 - 20:39 Link
As said, if all goes well I have a Sigma EX 100-300mm f4 on its way!

What's the best tele converter to give me more reach without interfering with the sharpness, A/F etc?

Thanks.
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
bforbes
Posted 18/01/2021 - 20:48 - Helpful Comment Link
If you're using it on the K-1 not a lot of choice. On a crop body the only on to go for, IMHO, the Pentax 1.4x
cardiffgareth
Posted 18/01/2021 - 20:55 Link
Yes, it'll be used on my K1
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
bforbes
Posted 18/01/2021 - 21:01 - Helpful Comment Link
I've tried a Kenko Teleplus Pz-AF 1.5x SHQ, it works on full frame. But not a patch on the Pentax 1.4x for preserving IQ
bforbes
Posted 18/01/2021 - 21:02 Link
Have you thought about using the K-1 in crop mode or just cropping?
cardiffgareth
Posted 18/01/2021 - 21:18 Link
Cool, so next on the shopping list will be the Pentax T/C but it'll have to wait till funds allow as I've spent sooo much this year already on new gear
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
cardiffgareth
Posted 18/01/2021 - 21:18 Link
bforbes wrote:
Have you thought about using the K-1 in crop mode or just cropping?

I'll have to crop for now. Not wanting to use in crop mode if I can help it as I want the pixels so I can print large
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
bforbes
Posted 18/01/2021 - 21:21 Link
cardiffgareth wrote:
as I've spent sooo much this year already on new gear

... and it's only January. Looks like a long year for you Gareth.
bforbes
Posted 18/01/2021 - 21:33 Link
I'm not up on prices of the 100-300, but if you have to add in a converter how does that compare to a 150- 450?
cardiffgareth
Posted 18/01/2021 - 21:39 Link
It'll be a lot cheaper but of course via a T/C and no WR
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
bforbes
Posted 18/01/2021 - 22:01 Link
K-1 + Pentax 1.4x with 150-450 @ 300mmComment Image
jeallen01
Posted 19/01/2021 - 09:16 Link
Not tried the Pentax HD converter on my 100-300 yet, but, if you can find one, the original Sigma EX 1.4x works pretty well on it. OTOH, don't get the Ex 2.0x version unless you can put up with far more "iffy" AF (which was why I sold my copy of that)!
K-3 II, K-3 and a K-70 from SRS (having now relegated the K-30 /"K-50" to a backup body), & some Sigma and Pentax lenses (and a lot of old 35mm gear!)

Add Comment

To leave a comment - Log in to Pentax User or create a new account.