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04-22-2018, 07:26 AM   #1
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KAF4 Lenses

I have the Pentax 55-300mm KAF4 lens. Are there toing to be any more KAF4 lenses? Are there any more available now?

04-22-2018, 07:37 AM   #2
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18-50 I think is the only other one so far.

EDIT: Just the one lens so far.

Last edited by UncleVanya; 04-22-2018 at 09:59 AM.
04-22-2018, 08:38 AM   #3
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QuoteOriginally posted by UncleVanya Quote
18-50 I think is the only other one so far.
The 18-50 is KAF3 in that it has the traditional mechanical aperture actuator. At present, only the 55-300 is KAF4.


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04-22-2018, 08:40 AM   #4
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QuoteOriginally posted by UncleVanya Quote
18-50 I think is the only other one so far.
I use my 18-50 on a K-x (a compact and carefree lightweight combination),
so I don't think this one is a KAF 4 lens.

04-22-2018, 09:01 AM   #5
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QuoteOriginally posted by UncleVanya Quote
18-50 I think is the only other one so far.
This one is not a KAF4 lens but is also retractable. If I remember correctly the DFA* 50 will be the second KAF4 (electro-magnetic aperture control) lens.
04-22-2018, 09:52 AM   #6
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QuoteOriginally posted by stevebrot Quote
The 18-50 is KAF3 in that it has the traditional mechanical aperture actuator. At present, only the 55-300 is KAF4.


Steve
Oops! I have it but I'm away from the lens and couldn't recall.
04-22-2018, 10:00 AM   #7
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I’m guessing the new lenses will all be KAF4. Why else would they hide the mount on the 11-18 photos?
04-22-2018, 10:08 AM   #8
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QuoteOriginally posted by Kozlok Quote
I’m guessing the new lenses will all be KAF4. Why else would they hide the mount on the 11-18 photos?
why would Pentax go away from its strength: the ability to use older camera bodies?

" **Because the aperture is controlled electronically, this lens can only stop down when used with compatible cameras. The Pentax K-50, K-S1, K-S2, K-3, K-3 II, and K-1 are supported via a camera firmware update; the Pentax K-70, Pentax KP and all 2017 or newer bodies will work out of the box. The aperture diaphragm will always remain wide-open on unsupported bodies.

In an nutshell, this lens fully compatible with recent DSLRs but shouldn't be used on older bodies or film cameras. "


Read more at: https://www.pentaxforums.com/reviews/hd-pentax-da-55-300mm-f45-63-ed-plm-wr/...#ixzz5DQe3Z579


Last edited by aslyfox; 04-22-2018 at 11:51 AM.
04-22-2018, 10:36 AM   #9
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QuoteOriginally posted by Kozlok Quote
I’m guessing the new lenses will all be KAF4. Why else would they hide the mount on the 11-18 photos?
According to this article DA*11-18 will have a KA3 mount.
04-22-2018, 01:32 PM   #10
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QuoteOriginally posted by cainmh Quote
I have the Pentax 55-300mm KAF4 lens. Are there toing to be any more KAF4 lenses? Are there any more available now?
The D FA* 50mm will have a KAF4 mount.

I think it makes sense to fully switch over to KAF4 for FF lenses, while crop lenses should stay with KAF3 until older models like the K-30 and K-5 decrease significantly in popularity.

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04-22-2018, 01:57 PM   #11
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QuoteOriginally posted by Adam Quote
The D FA* 50mm will have a KAF4 mount.

I think it makes sense to fully switch over to KAF4 for FF lenses, while crop lenses should stay with KAF3 until older models like the K-30 and K-5 decrease significantly in popularity.
I f I read this chart correctly

The Pentax Camera Lens Compatibility Chart the following Pentax Camera bodies:

K-1 [ and its replacement ], K-3 II [ and its replacement], K 3, K-50, K-70, K-S1, K-S2

will be or are able to handle the KAF4

9 total
______________________

these cannot:

K-01, K10D, K20D, K-7, K-5, K-5 II,
K-5 IIS, K-30, K-500, K-m, K2000, K-x, K-r
K100D Super, K200D, *ist D series, K100D, K110D

I wonder how many folks use the camera bodies that are incompatible with the KAF4

Last edited by aslyfox; 04-23-2018 at 06:33 AM.
04-22-2018, 03:49 PM - 2 Likes   #12
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QuoteOriginally posted by Aslyfox Quote
I f I read this chart correctly
I wonder how many folks use the camera bodies that are incompatible with the KAF4
Here is the number of photos uploaded to the forum from each camera model (this only includes galleries/albums/attachments), so far this year:

PENTAX K-3 1600
PENTAX K-1 1053
PENTAX K-5 789
PENTAX K-3 II 472
PENTAX K-50 358
PENTAX K-5 II 316
PENTAX KP 272
PENTAX K-70 267
PENTAX K-5 II s 232
PENTAX K-30 158
PENTAX K-7 129
PENTAX K20D 125
PENTAX K-S2 118
PENTAX 645D 100
PENTAX K200D 99
PENTAX K10D 93
PENTAX 645Z 81
PENTAX K-r 52
PENTAX K-01 50
PENTAX K100D Super 44
PENTAX K-x 39
PENTAX *ist D 39
PENTAX K100D 29
PENTAX Q 27

Based on this, 1878 out of 6334 K-series photos (~30%) were taken with incompatible cameras.

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04-22-2018, 04:12 PM   #13
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QuoteOriginally posted by Adam Quote
Here is the number of photos uploaded to the forum from each camera model (this only includes galleries/albums/attachments), so far this year:

. . .

Based on this, 1878 out of 6334 K-series photos (~30%) were taken with incompatible cameras.
that answers that

thanks
04-23-2018, 12:21 AM   #14
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QuoteOriginally posted by Aslyfox Quote
I wonder how many folks use the camera bodies that are incompatible with the KAF4
They are not incompatible, they just missing one function. Like in the past Powerzoom.
Currently it seems like cheaper lenses (mass market) will be introduced as KAF4, so no worries for longtime Pentax users. There are plenty of options with KAF3 now.

Last edited by angerdan; 04-23-2018 at 12:28 AM.
04-23-2018, 06:06 AM - 1 Like   #15
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QuoteOriginally posted by angerdan Quote
They are not incompatible, they just missing one function. Like in the past Powerzoom.
Currently it seems like cheaper lenses (mass market) will be introduced as KAF4, so no worries for longtime Pentax users. There are plenty of options with KAF3 now.
I don't think that's a fair comparison. A lack of power zoom features doesn't prevent basic exposure control. Electronic aperture that you can't manipulate is a pretty serious lack of functionality.

Your second point, that there are many kaf3 lenses already available is certainly true.
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