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**david94903** · 08-29-2020, 12:29 PM - **5 Likes**

Been using my long lens for landscape work lately.

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**joehenryd** · 08-29-2020, 04:38 PM - **1 Like**

Great Horned Owl. ISO 6400 Joe

**termy** · 09-01-2020, 04:01 AM - **6 Likes**

at f8, shutter 1/640, iso640.

Pentaxians · 09-09-2020, 09:44 PM - **1 Like**

Black-winged Kite with DFA150-450 and Kp.

**termy** · 09-10-2020, 06:05 AM - **4 Likes**

'15 not long after taking off.

**aslyfox** · 09-18-2020, 05:33 AM - **1 Like**

bull elk and cows in Rocky Mountain National Park

Paul the Sunman · 09-19-2020, 06:07 AM - **2 Likes**

Red Wattlebird

**marcusBMG** · 09-22-2020, 02:28 PM - **1 Like**

I've been photographing a newly born seal pup at local seal hangout Angel Bay - see more posts in adaptall lens club and 300mm lens club. KS2.

Other activity...

**darylk** · 09-23-2020, 08:07 PM - **11 Likes**

Taken this afternoon...

Paul the Sunman · 09-27-2020, 03:29 AM - **3 Likes**

Feed me

Masked Plover

Shooting more with the K-3 lately, after a few years of K-1 only. I'm enjoying the extra reach and the reduced weight (even with the 150-450 attached), but am looking forward to enhanced AF and better high ISO on the K-new.

Paul the Sunman · 09-30-2020, 08:45 PM - **3 Likes**

Still stuck in lockdown in Melbourne, with a 5km limit on travel, so not much to see or do except stalk the local birds. Still, an Eastern Rosella is always worth a look.

Unregistered User · 10-09-2020, 02:11 AM

There've been a couple of occasions when I've mentioned the fact that the lens I've got will "auto-extend" or "auto-retract" by means of gravity if I don't hold it horizontally. E.g., attempting a bit of astrophotography at 450mm, when I pointed the lens toward the sky, it collapsed back to 150 as it "breathed". There was a bit of discussion, as others had that happen, too, and we "talked" about how best to restrain its movement (I used a big rubber band, other suggestions included gaffer's tape).

Now that I'm thinking about it, I'm wondering, how many copies of this model lens do that? Isn't this a "shouldn't happen situation"? Is it a common problem, or rare, and has anyone attempted a warranty claim or had to have the lens "repaired"?

What's your experience?

Paul the Sunman · 10-09-2020, 02:22 AM

Originally posted by dlh

There've been a couple of occasions when I've mentioned the fact that the lens I've got will "auto-extend" or "auto-retract" by means of gravity if I don't hold it horizontally.

Yes, it does that. I never point it so vertical that it matters, but I can see it would be a problem if shooting steeply upward. I wouldn't say the lens is loose, just that there is a lot of weight in it, so it sags as you say. My only criticism of the DFA 150-450 is that the focus lock can only be engaged at 150mm; if you could use it at any focal length, your problem would be solved.

Unregistered User · 10-09-2020, 02:37 AM

Originally posted by Paul the Sunman

... My only criticism of the DFA 150-450 is that the focus lock can only be engaged at 150mm; if you could use it at any focal length, your problem would be solved.

I was thinking the same thing. Instead of that locking mechanism, which would have to become a ratchet and pawl system to do what I want, I'm thinking one of those locking-ring functions some lenses have to keep the manual focus ring from changing position.

RobG · 10-10-2020, 06:36 AM - **12 Likes**

Leaden Flycatcher by RobGeraghty, on Flickr

---------- Post added 11-10-20 at 12:37 AM ----------

Varied Sitella by RobGeraghty, on Flickr

---------- Post added 11-10-20 at 12:37 AM ----------

Variegated Fairy-wren by RobGeraghty, on Flickr

09-27-2020, 03:29 AM - 3 Likes	#2365
Paul the Sunman Pentaxian Join Date: Aug 2011 Location: Melbourne Photos: Gallery Posts: 4,847	Afternoon walk along our local creek Feed me Masked Plover Shooting more with the K-3 lately, after a few years of K-1 only. I'm enjoying the extra reach and the reduced weight (even with the 150-450 attached), but am looking forward to enhanced AF and better high ISO on the K-new. Last edited by Paul the Sunman; 09-28-2020 at 04:04 AM.

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09-09-2020, 09:44 PM - 1 Like	#2359
Pentaxians Pentaxian Join Date: May 2011 Location: Singapore Photos: Gallery \| Albums Posts: 733	Black-winged Kite with DFA150-450 and Kp.

09-19-2020, 06:07 AM - 2 Likes	#2362
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09-22-2020, 02:28 PM - 1 Like	#2363
marcusBMG Site Supporter Join Date: Nov 2012 Location: North Wales Photos: Gallery \| Albums Posts: 2,870	I've been photographing a newly born seal pup at local seal hangout Angel Bay - see more posts in adaptall lens club and 300mm lens club. KS2. Other activity...

09-30-2020, 08:45 PM - 3 Likes	#2366
Paul the Sunman Pentaxian Join Date: Aug 2011 Location: Melbourne Photos: Gallery Posts: 4,847	Still stuck in lockdown in Melbourne, with a 5km limit on travel, so not much to see or do except stalk the local birds. Still, an Eastern Rosella is always worth a look.

10-09-2020, 02:11 AM	#2367
Unregistered User Guest	There've been a couple of occasions when I've mentioned the fact that the lens I've got will "auto-extend" or "auto-retract" by means of gravity if I don't hold it horizontally. E.g., attempting a bit of astrophotography at 450mm, when I pointed the lens toward the sky, it collapsed back to 150 as it "breathed". There was a bit of discussion, as others had that happen, too, and we "talked" about how best to restrain its movement (I used a big rubber band, other suggestions included gaffer's tape). Now that I'm thinking about it, I'm wondering, how many copies of this model lens do that? Isn't this a "shouldn't happen situation"? Is it a common problem, or rare, and has anyone attempted a warranty claim or had to have the lens "repaired"? What's your experience?

10-09-2020, 02:22 AM	#2368
Paul the Sunman Pentaxian Join Date: Aug 2011 Location: Melbourne Photos: Gallery Posts: 4,847	Originally posted by dlh There've been a couple of occasions when I've mentioned the fact that the lens I've got will "auto-extend" or "auto-retract" by means of gravity if I don't hold it horizontally. Yes, it does that. I never point it so vertical that it matters, but I can see it would be a problem if shooting steeply upward. I wouldn't say the lens is loose, just that there is a lot of weight in it, so it sags as you say. My only criticism of the DFA 150-450 is that the focus lock can only be engaged at 150mm; if you could use it at any focal length, your problem would be solved.

10-09-2020, 02:37 AM	#2369
Unregistered User Guest	Originally posted by Paul the Sunman ... My only criticism of the DFA 150-450 is that the focus lock can only be engaged at 150mm; if you could use it at any focal length, your problem would be solved. I was thinking the same thing. Instead of that locking mechanism, which would have to become a ratchet and pawl system to do what I want, I'm thinking one of those locking-ring functions some lenses have to keep the manual focus ring from changing position.

10-10-2020, 06:36 AM - 12 Likes	#2370
RobG Otis Memorial Pentaxian Join Date: Dec 2009 Location: Canberra Photos: Gallery \| Albums Posts: 8,905	Leaden Flycatcher by RobGeraghty, on Flickr ---------- Post added 11-10-20 at 12:37 AM ---------- Varied Sitella by RobGeraghty, on Flickr ---------- Post added 11-10-20 at 12:37 AM ---------- Variegated Fairy-wren by RobGeraghty, on Flickr

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