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SunDance · 04-27-2012, 04:56 AM

Is the Pentax 100-300 F4.5-5.6 SMC FA compatible with my Pentax K7?

asp1880 · 04-27-2012, 05:12 AM

Yes. Except the aperture ring won't work, it must be kept in the A position and you control aperture using the scroll wheels on the camera instead.

Regards,
--Anders.

Alizarine · 04-27-2012, 03:22 PM

Originally posted by First Poster

Is the Pentax 100-300 F4.5-5.6 SMC FA compatible with my Pentax K7?

Fully compatible. You can still use the aperture ring, you just have to turn on the function from the menu. Turn on "Enable use of Aperture Ring" in the camera options. This would disengage aperture control from the wheels though.

**jatrax** · 04-27-2012, 09:19 PM

Originally posted by Alizarine

Turn on "Enable use of Aperture Ring" in the camera options. This would disengage aperture control from the wheels though.

Just to clarify: "Enable use of Aperture Ring" permits the use of the aperture ring but does not require it. If the lens is in the 'A' position then the camera wheels work, if the aperture ring is in any position but 'A' then the camera wheel will be disengaged from the aperture and the aperture ring must be used.

Marc Sabatella · 04-28-2012, 11:11 AM

Originally posted by Alizarine

Fully compatible. You can still use the aperture ring, you just have to turn on the function from the menu. Turn on "Enable use of Aperture Ring" in the camera options. This would disengage aperture control from the wheels though.

Using the aperture ring also prevents any mode but "M" from actually working, and cripples "M" mode to require stop down metering. Definitely not something you'd do by choice. if your aperture ring has an "A" position, leave it there.

04-27-2012, 04:56 AM	#1
SunDance Guest	Is the Pentax 100-300 F4.5-5.6 SMC FA compatible with my Pentax K7? Is the Pentax 100-300 F4.5-5.6 SMC FA compatible with my Pentax K7?

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04-27-2012, 05:12 AM	#2
asp1880 Veteran Member Join Date: Jul 2010 Location: Lyngby, Copenhagen Photos: Albums Posts: 742	Yes. Except the aperture ring won't work, it must be kept in the A position and you control aperture using the scroll wheels on the camera instead. Regards, --Anders.

04-27-2012, 03:22 PM	#3
Alizarine Veteran Member Join Date: Dec 2010 Location: Manila Photos: Gallery \| Albums Posts: 2,185	Originally posted by First Poster Is the Pentax 100-300 F4.5-5.6 SMC FA compatible with my Pentax K7? Fully compatible. You can still use the aperture ring, you just have to turn on the function from the menu. Turn on "Enable use of Aperture Ring" in the camera options. This would disengage aperture control from the wheels though.

04-27-2012, 09:19 PM	#4
jatrax Site Supporter Join Date: May 2010 Location: Washington Cascades Photos: Gallery \| Albums Posts: 12,991	Originally posted by Alizarine Turn on "Enable use of Aperture Ring" in the camera options. This would disengage aperture control from the wheels though. Just to clarify: "Enable use of Aperture Ring" permits the use of the aperture ring but does not require it. If the lens is in the 'A' position then the camera wheels work, if the aperture ring is in any position but 'A' then the camera wheel will be disengaged from the aperture and the aperture ring must be used.

04-28-2012, 11:11 AM	#5
Marc Sabatella Veteran Member Join Date: Sep 2006 Location: Denver, CO Photos: Gallery Posts: 10,685	Originally posted by Alizarine Fully compatible. You can still use the aperture ring, you just have to turn on the function from the menu. Turn on "Enable use of Aperture Ring" in the camera options. This would disengage aperture control from the wheels though. Using the aperture ring also prevents any mode but "M" from actually working, and cripples "M" mode to require stop down metering. Definitely not something you'd do by choice. if your aperture ring has an "A" position, leave it there.