Pentax 150-450mm F4.5-5.6 with 1.4x converter
Posted 22/06/2019 - 12:06
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Just remember the 1.4x is not suitable for FF.
Barrie - Too Old To Die Young
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
Posted 22/06/2019 - 12:53
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Not sure if i'm imagining it, but i think I read somewhere that Pentax are bringing out a FF convertor later this year...there might have been mention of two new convertors.
Posted 24/06/2019 - 12:43
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I'm not planning a switch to FF, just wanted to know how well suited the x1.4 converter is to the 150-450 zoom lens.
Posted 25/06/2019 - 00:01 - Helpful Comment
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Fine on an on you k3 II but remember the perspective at 450 is equivalent to a very long telephoto when you combine the cropping factor for the APS x1.4 from the converter.
The field of view will be comparable to that of a lens of 945mm focal length ( if my old codger brain is still OK - if not please feel free to correct me)
But I have used the 1.4 x on the 150-450 with my K3II and if your camera and lens are well supported it’s optically ok for sure, but not ideal; bit like using an RPGL or carrying a extension ladder o your shoulder
The field of view will be comparable to that of a lens of 945mm focal length ( if my old codger brain is still OK - if not please feel free to correct me)
But I have used the 1.4 x on the 150-450 with my K3II and if your camera and lens are well supported it’s optically ok for sure, but not ideal; bit like using an RPGL or carrying a extension ladder o your shoulder
Daronl
Posted 25/06/2019 - 12:23 - Helpful Comment
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I didn't have the K3 + 1.4x + DFA 150-450 for long but I was very happy with the results, here's a couple of example, both hand held IIRC:
LR lens profile pp only
LR lens profile pp only
Cheers
Brian.
LBA is good for you, a Lens a day helps you work, rest and play.
Brian.
LBA is good for you, a Lens a day helps you work, rest and play.
Posted 26/06/2019 - 13:00 - Helpful Comment
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bforbes wrote:
Just remember the 1.4x is not suitable for FF.
Just remember the 1.4x is not suitable for FF.
Depends what you mean by "not suitable". I regularly use the 1.4x convertor with the 150-450, Tamron 70-200 f2.8 and the Tamron 90 f2.8 on my K1. It works well with all these lens with only a small amount of vignette in the four corners. This I usually deal with by a minimal amount of cropping.
This was taken on the cliffs at Flamborough Head with K1, 150-450 plus 1.4x convertor. Very little vignette
Posted 26/06/2019 - 22:57
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AlB wrote:
Depends what you mean by "not suitable". I regularly use the 1.4x convertor with the 150-450, Tamron 70-200 f2.8 and the Tamron 90 f2.8 on my K1. It works well with all these lens with only a small amount of vignette in the four corners. This I usually deal with by a minimal amount of cropping.
This was taken on the cliffs at Flamborough Head with K1, 150-450 plus 1.4x convertor. Very little vignette
bforbes wrote:
Just remember the 1.4x is not suitable for FF.
Just remember the 1.4x is not suitable for FF.
Depends what you mean by "not suitable". I regularly use the 1.4x convertor with the 150-450, Tamron 70-200 f2.8 and the Tamron 90 f2.8 on my K1. It works well with all these lens with only a small amount of vignette in the four corners. This I usually deal with by a minimal amount of cropping.
This was taken on the cliffs at Flamborough Head with K1, 150-450 plus 1.4x convertor. Very little vignette
The 1.4x was designed for crop sensor, so to me that amount of vignette means "not suitable".
Barrie - Too Old To Die Young
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
Posted 30/06/2019 - 20:18
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Wonderful shots, I would like to buy 1.4 x converter and use it with my K5IIs and DA 100mm macro 2.8 WR and 60-250. I found in Italy one used but similar to new.
Please have you a samples with these lens?
When this converter is used the main lens is recognized by ACR for distortion correction?
Thanks for your help and have a nice week.
Toni
Please have you a samples with these lens?
When this converter is used the main lens is recognized by ACR for distortion correction?
Thanks for your help and have a nice week.
Toni
Toni
Posted 01/07/2019 - 10:10
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I use the x1.4 converter with my K3II and PENTAX-D FA 100mm F2.8 MACRO all the time - it's a great combination giving additional stand-off distance that's very useful for butterflies.
I don't know if the camera recognises the converter for distortion correction (I usually shoot RAW) but the results are first class. See my Flickr pages at https://www.flickr.com/gp/darrelphoto/05N75s
Best
Darrel
I don't know if the camera recognises the converter for distortion correction (I usually shoot RAW) but the results are first class. See my Flickr pages at https://www.flickr.com/gp/darrelphoto/05N75s
Best
Darrel
Posted 01/07/2019 - 14:27
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And I use the x1.4 converter with a K3 and Sigma 105mm macro to good effect. Can't see why it shouldn't be as good with a DA 100mm macro and K5IIs. But like Darrel, I don't know whether the lens and/or converter is recognised for distortion correction (I never use it).
Steve
Steve
Posted 03/07/2019 - 07:37
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Thanks for reply, I am sure that the converter works fine with K5IIs and DA 100 mm macro.
Darrel I shoot in raw (dng) only in raw, I've seen your photos, my congrats for macro and train photos that is one of my favorite subject.
I'm considering the purchase.
I wish you the best.
Darrel I shoot in raw (dng) only in raw, I've seen your photos, my congrats for macro and train photos that is one of my favorite subject.
I'm considering the purchase.
I wish you the best.
Toni
Posted 03/07/2019 - 15:45
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Thanks Toni - good luck!
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17 years
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