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360fish · 08-06-2008, 09:40 PM

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I didn't see anything on the forums regarding this - I've got a nice Nikkor ED AF 80-300 2.8 zoom and a speedlight sb-22 but finding it hard to get info on adapters. Could I use the flash as a slave? it has an pc/xSync port which my k200d lacks, I'd love to get it working some way.

I understand mount adapters can result in the lens unable to focus to infinity, but I can't find if even a non-infinity-focusing adapter is available.

UPDATE - found this thread about nikon flashes with pentax, I guss I'll have to play around with it but sounds like it'll work! the lens is a much bigger deal though...

thanks for any info.

D

Last edited by 360fish; 08-06-2008 at 10:03 PM. Reason: Updated info on flash

flyer · 08-07-2008, 04:16 AM

The Pentax and Nikon lens mount are almost identical, so I think with a little work, one could be made to work with the other.

JJJPhoto · 08-07-2008, 04:38 AM

When I switched from Nikon and Fuji to Canon I sold all my Nikon gear ... except my Nikon flash units. When I switched from Canon to Pentax I sold all my Canon gear ... but I still kept the Nikon flashes.

IMHO, Nikon simply does a FANTASTIC job with their flash units. The SB800s in particular are my favorite flashes.

I have several P-TTL flash units from Pentax, but I still use the Nikon speedlights as off-camera flash units ... and sometimes just as a fast-recycling Auto flash on camera.

Anyway, I wasn't a huge fan of Nikon DSLRs, but I'll never give up my Nikon flashes ... unless another manufacturer wakes up and makes even better flash units for roughly the same price (or less).

HGMonaro · 08-07-2008, 05:28 AM

buy one of these and tell me if I should buy one

(Will be manual focus and stop-down metering as no aperture or electrical contacts)

Nikon lens to Pentax K10d k20d k100d k200d DS adapter - eBay (item 350084478389 end time Aug-06-08 10:42:24 PDT)

innershell · 08-07-2008, 07:00 AM

Originally posted by HGMonaro

buy one of these and tell me if I should buy one

(Will be manual focus and stop-down metering as no aperture or electrical contacts)

Nikon lens to Pentax K10d k20d k100d k200d DS adapter - eBay (item 350084478389 end time Aug-06-08 10:42:24 PDT)

Wow, never knew that existed. But then again, this is only worth it for those of you already with Nikon gear. Nikon lenses (from what I've seen) are significantly more expensive than Pentax ones.

reeftool · 08-07-2008, 09:14 AM

I've never heard of those adapters. I have a couple of Nikon paperweights they may work on but I don't know if I want to be the guinnea pig.

ryan s · 08-07-2008, 10:57 AM

The older (pre)AI lenses already fit in the Pentax bayonet and focus to infinity...

Nico · 08-07-2008, 12:24 PM

Originally posted by HGMonaro

buy one of these and tell me if I should buy one

(Will be manual focus and stop-down metering as no aperture or electrical contacts)

Nikon lens to Pentax K10d k20d k100d k200d DS adapter - eBay (item 350084478389 end time Aug-06-08 10:42:24 PDT)

I have seen this item before but there is a optical element in it. I wonder how good the optics are for the price.

woof · 08-07-2008, 01:46 PM

Originally posted by ryan s

The older (pre)AI lenses already fit in the Pentax bayonet and focus to infinity...

I can confirm this. I have an old pre-AI 300mm Nikon lens as well as a 105mm and a 28mm, all of which I have used on occasion.

I should take a few pics and add them to the "off brands" thread.

woof!

HGMonaro · 08-07-2008, 04:36 PM

I just tried to mount both Ais (105/2.5) and Pre-Ai (135/3.5) Nikkors to my K10D and they didn't fit. Bayonet fits the hole but won't turn more than a mm or so. Can take a picture but lens is close to falling off! Not recommended.

stevebrot · 08-07-2008, 06:14 PM

Originally posted by woof

I can confirm this. I have an old pre-AI 300mm Nikon lens as well as a 105mm and a 28mm, all of which I have used on occasion.

I should take a few pics and add them to the "off brands" thread.

woof!

Someone beat you to it. Quicksand posted some pics from his Micro-Nikkor 55/3.8.

Steve

Big Dave · 08-07-2008, 07:41 PM

Hi,
The Nikon manual lenses fit the K-mount when properly positioned. You must make sure that the light baffle doesn't protrude more then 8.5mm into the body past the mount. Insert the lens with the index dot at about the 6 o'clock position. Seat gently. Take using the camera, since the lock pin isn't seated. Here is a photo of my 35/2 mounted on my K100DS.

Dave

Originally posted by HGMonaro

I just tried to mount both Ais (105/2.5) and Pre-Ai (135/3.5) Nikkors to my K10D and they didn't fit. Bayonet fits the hole but won't turn more than a mm or so. Can take a picture but lens is close to falling off! Not recommended.

HGMonaro · 08-08-2008, 03:26 AM

thought I tried all positions... I'll give it another go!

dave sz · 08-09-2008, 06:24 PM

I just got a promaster 28-200 that the seller said was for pentax, it's actually nikon mount. The lens mounts just fine two ways. One way is to align the red dots almost perfectly, the other is to mount the lens upside down, aperture markings on bottom of the lens. Are both of these ways safe? Should I try to remove the pin/blade on the lens to prevent any damage or will that ruin the lens?

dave sz · 08-10-2008, 11:21 AM

nevermind, the upside down method or the 2 oclock method do not work. The lens goes in but there is no support, just falls out. Only way it stays is if I line up the dots almost perfectly and get a small turn in...

08-06-2008, 09:40 PM	#1
360fish Inactive Account Join Date: Jul 2008 Location: sf, ca Posts: 3	can I use any of my old Nikon gear w/ my new pentax system? Staff note: This post may contain affiliate links, which means Pentax Forums may earn a small commission if a visitor clicks through and makes a purchase. If you would like to support the forum directly, you may also make a donation here. I didn't see anything on the forums regarding this - I've got a nice Nikkor ED AF 80-300 2.8 zoom and a speedlight sb-22 but finding it hard to get info on adapters. Could I use the flash as a slave? it has an pc/xSync port which my k200d lacks, I'd love to get it working some way. I understand mount adapters can result in the lens unable to focus to infinity, but I can't find if even a non-infinity-focusing adapter is available. UPDATE - found this thread about nikon flashes with pentax, I guss I'll have to play around with it but sounds like it'll work! the lens is a much bigger deal though... thanks for any info. D Last edited by 360fish; 08-06-2008 at 10:03 PM. Reason: Updated info on flash

08-07-2008, 07:41 PM	#12
Big Dave Veteran Member Join Date: Jan 2008 Location: San Antonio, Texas Photos: Gallery Posts: 547	Hi, The Nikon manual lenses fit the K-mount when properly positioned. You must make sure that the light baffle doesn't protrude more then 8.5mm into the body past the mount. Insert the lens with the index dot at about the 6 o'clock position. Seat gently. Take using the camera, since the lock pin isn't seated. Here is a photo of my 35/2 mounted on my K100DS. Dave Originally posted by HGMonaro I just tried to mount both Ais (105/2.5) and Pre-Ai (135/3.5) Nikkors to my K10D and they didn't fit. Bayonet fits the hole but won't turn more than a mm or so. Can take a picture but lens is close to falling off! Not recommended. Attached Images Last edited by Big Dave; 08-07-2008 at 07:46 PM.

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08-07-2008, 04:16 AM	#2
flyer Veteran Member Join Date: Jan 2008 Location: Ste-Anne des Plaines, Qc., Canada Posts: 2,013	The Pentax and Nikon lens mount are almost identical, so I think with a little work, one could be made to work with the other.

08-07-2008, 04:38 AM	#3
JJJPhoto Veteran Member Join Date: Nov 2006 Location: Cincinnati, OH Posts: 419	When I switched from Nikon and Fuji to Canon I sold all my Nikon gear ... except my Nikon flash units. When I switched from Canon to Pentax I sold all my Canon gear ... but I still kept the Nikon flashes. IMHO, Nikon simply does a FANTASTIC job with their flash units. The SB800s in particular are my favorite flashes. I have several P-TTL flash units from Pentax, but I still use the Nikon speedlights as off-camera flash units ... and sometimes just as a fast-recycling Auto flash on camera. Anyway, I wasn't a huge fan of Nikon DSLRs, but I'll never give up my Nikon flashes ... unless another manufacturer wakes up and makes even better flash units for roughly the same price (or less).

08-07-2008, 05:28 AM	#4
HGMonaro Veteran Member Join Date: Apr 2007 Location: Melb. Aust Posts: 840	buy one of these and tell me if I should buy one (Will be manual focus and stop-down metering as no aperture or electrical contacts) Nikon lens to Pentax K10d k20d k100d k200d DS adapter - eBay (item 350084478389 end time Aug-06-08 10:42:24 PDT)

08-07-2008, 07:00 AM	#5
innershell Veteran Member Join Date: Sep 2007 Location: Edmonton, AB, Canada Posts: 408	Originally posted by HGMonaro buy one of these and tell me if I should buy one (Will be manual focus and stop-down metering as no aperture or electrical contacts) Nikon lens to Pentax K10d k20d k100d k200d DS adapter - eBay (item 350084478389 end time Aug-06-08 10:42:24 PDT) Wow, never knew that existed. But then again, this is only worth it for those of you already with Nikon gear. Nikon lenses (from what I've seen) are significantly more expensive than Pentax ones.

08-07-2008, 09:14 AM	#6
reeftool Pentaxian Join Date: Dec 2007 Location: Upstate New York Photos: Gallery \| Albums Posts: 9,555	I've never heard of those adapters. I have a couple of Nikon paperweights they may work on but I don't know if I want to be the guinnea pig.

08-07-2008, 10:57 AM	#7
ryan s Veteran Member Join Date: Jan 2008 Location: Madison, WI Photos: Gallery Posts: 2,383	The older (pre)AI lenses already fit in the Pentax bayonet and focus to infinity...

08-07-2008, 12:24 PM	#8
Nico Senior Member Join Date: May 2008 Location: Irvine, So. Cal Posts: 127	Originally posted by HGMonaro buy one of these and tell me if I should buy one (Will be manual focus and stop-down metering as no aperture or electrical contacts) Nikon lens to Pentax K10d k20d k100d k200d DS adapter - eBay (item 350084478389 end time Aug-06-08 10:42:24 PDT) I have seen this item before but there is a optical element in it. I wonder how good the optics are for the price.

08-07-2008, 01:46 PM	#9
woof Inactive Account Join Date: Nov 2007 Location: In the present Photos: Gallery Posts: 1,870	Originally posted by ryan s The older (pre)AI lenses already fit in the Pentax bayonet and focus to infinity... I can confirm this. I have an old pre-AI 300mm Nikon lens as well as a 105mm and a 28mm, all of which I have used on occasion. I should take a few pics and add them to the "off brands" thread. woof!

08-07-2008, 04:36 PM	#10
HGMonaro Veteran Member Join Date: Apr 2007 Location: Melb. Aust Posts: 840	I just tried to mount both Ais (105/2.5) and Pre-Ai (135/3.5) Nikkors to my K10D and they didn't fit. Bayonet fits the hole but won't turn more than a mm or so. Can take a picture but lens is close to falling off! Not recommended.

08-07-2008, 06:14 PM	#11
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by woof I can confirm this. I have an old pre-AI 300mm Nikon lens as well as a 105mm and a 28mm, all of which I have used on occasion. I should take a few pics and add them to the "off brands" thread. woof! Someone beat you to it. Quicksand posted some pics from his Micro-Nikkor 55/3.8. Steve

08-08-2008, 03:26 AM	#13
HGMonaro Veteran Member Join Date: Apr 2007 Location: Melb. Aust Posts: 840	thought I tried all positions... I'll give it another go!

08-09-2008, 06:24 PM	#14
dave sz Veteran Member Join Date: Dec 2006 Location: carpentersville, IL Posts: 693	I just got a promaster 28-200 that the seller said was for pentax, it's actually nikon mount. The lens mounts just fine two ways. One way is to align the red dots almost perfectly, the other is to mount the lens upside down, aperture markings on bottom of the lens. Are both of these ways safe? Should I try to remove the pin/blade on the lens to prevent any damage or will that ruin the lens?

08-10-2008, 11:21 AM	#15
dave sz Veteran Member Join Date: Dec 2006 Location: carpentersville, IL Posts: 693	nevermind, the upside down method or the 2 oclock method do not work. The lens goes in but there is no support, just falls out. Only way it stays is if I line up the dots almost perfectly and get a small turn in...

can I use any of my old Nikon gear w/ my new pentax system?

Win a Pentax Limited Lens: Raffle Now Live!