300mm plus Lens Club: discuss your long lenses

**stihlmania** · 04-11-2018, 05:52 AM - **1 Like**

Originally posted by Ducatigaz

On the FA*300/600mm lenses the rear filter is one of the lens elements the Sigma 300mm 2.8/500mm 4.5 are the same.
I think this is correct, if anyone knows any different please let me know.

On my A*400, the filter does affect focus but if I remove the filter I can simply refocus and get a sharp image. I tested this with about 20 shots each, with my K-3II and my 1st D, and with my lens I can use or not use the filter ( I do put the holder back in either way) Normally I leave the original Pentax UV filter installed to help keep dust out of the lens....

pete-tarmigan · 04-11-2018, 06:44 AM - **1 Like**

Originally posted by Ducatigaz

On the FA*300/600mm lenses the rear filter is one of the lens elements the Sigma 300mm 2.8/500mm 4.5 are the same.
I think this is correct, if anyone knows any different please let me know.

The user manual mentions the filter holder (p. 3) (49mm thread) but doesn't mention any mandatory filter or any filter included with the original lens. It does mention that the protective filter that can be screwed onto the front of the lens to protect the front element (p. 9), although it doesn't explicitly state that it was included in the original kit (150mm diameter for the 1200mm).

The user manual covers the all four of the A* super telephoto lenses (300mm f/2.8, 400mm f/2.8, 600mm f/5.6, 1200mm f/8). I have the 600mm. By the way, I have an original manual, so if anyone wants a PDF of the manual, I can scan it to make a more legible copy than is available on the web (a scan of a barely legible photocopy) and e-mail it to them. I'm not sure if there is a place on these forums where such manuals are made available.

**marcusBMG** · 04-11-2018, 08:05 AM

Originally posted by pete-tarmigan

I'm not sure if there is a place on these forums where such manuals are made available.

Just PM Adam, Pete, he'll be happy to park a pdf in an approriate place. Update actually he prefers to respond to a thread here:

https://www.pentaxforums.com/forums/3-site-suggestions-help/

**csa** · 04-11-2018, 09:13 AM - **3 Likes**

"Woody" enjoying some peanut butter.

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**WPRESTO** · 04-11-2018, 10:04 AM

Originally posted by csa

"Woody" enjoying some peanut butter.

Good to see an image posted by you. Has the dreadful cold there finally broken?

**dadipentak** · 04-11-2018, 10:58 AM - **2 Likes**

Originally posted by Ducatigaz

On the FA*300/600mm lenses the rear filter is one of the lens elements the Sigma 300mm 2.8/500mm 4.5 are the same. I think this is correct, if anyone knows any different please let me know.

It's kind of mysterious to me. Way back in this thread there's a discussion (primarily me & imtheguy) about the drop-in filter for the A*400/2.8. As I recall, the conclusion was that it was very important for that lens. OTOH, I lost the filter (& holder) for my FA*300/2.8

and it doesn't seem to have had any impact on IQ whatsoever. I have the opening covered with gaffer's tape. (

again)

zzeitg · 04-11-2018, 11:05 AM - **10 Likes**

DA560

**csa** · 04-12-2018, 07:49 AM

Originally posted by WPRESTO

Good to see an image posted by you. Has the dreadful cold there finally broken?

Thanks! Had a couple of overcast but pleasant days; now today & tonight under a "winter" storm warning again! Snow expected. I guess no Spring here, this year.

**csa** · 04-12-2018, 07:51 AM

Zzeitg; I've never seen such awesome photos of birds! Sure makes me envious of that 560! You really bring the best out of that lens!

**marcusBMG** · 04-12-2018, 11:04 AM - **3 Likes**

The great crested grebes didn't breed last year, but they're looking busy now..

These last two with my tamron 300mm f2.8 60B + newly acquired sigma 1.4 x tc, non "apo" this time, Samsung NX20. Some comparison pics indicate it is pretty much as sharp as the apo one but not as well corrected - more fringing and haloes etc creeping in specifically at open apertures.

This was a quick stacked tc's experiment - the sigma + adaptall 014F (=588mm focal length), f5.6 on the lens, 400ASA:

str8talk83 · 04-12-2018, 01:49 PM - **14 Likes**

Tried some bird in flight shots today. It's a shame the storks are so ugly...

**WPRESTO** · 04-12-2018, 03:00 PM

Old saying (more-or-less as I remember it): The lowliest of birds is poetry in flight.

**Canada_Rockies** · 04-12-2018, 04:22 PM - **1 Like**

Originally posted by str8talk83

Tried some bird in flight shots today. It's a shame the storks are so ugly...

Great shooting

**stihlmania** · 04-12-2018, 06:36 PM - **3 Likes**

"Tried some bird in flight shots today. It's a shame the storks are so ugly..."

This bird has a face even a mother might not love!

**aslyfox** · 04-12-2018, 06:40 PM

trying different pp and crop

I find it interesting how the flower bends down and thus the lighting is different on the parts of the flower

04-11-2018, 10:58 AM - 2 Likes	#28116
dadipentak Site Supporter Join Date: Jul 2008 Location: Baltimore, Maryland Photos: Gallery Posts: 11,590	Originally posted by Ducatigaz On the FA300/600mm lenses the rear filter is one of the lens elements the Sigma 300mm 2.8/500mm 4.5 are the same. I think this is correct, if anyone knows any different please let me know. It's kind of mysterious to me. Way back in this thread there's a discussion (primarily me & imtheguy) about the drop-in filter for the A400/2.8. As I recall, the conclusion was that it was very important for that lens. OTOH, I lost the filter (& holder) for my FA300/2.8 and it doesn't seem to have had any impact on IQ whatsoever. I have the opening covered with gaffer's tape. ( again) Last edited by dadipentak; 04-12-2018 at 08:48 AM.*

04-12-2018, 11:04 AM - 3 Likes	#28120
marcusBMG Site Supporter Join Date: Nov 2012 Location: North Wales Photos: Gallery \| Albums Posts: 2,868	The great crested grebes didn't breed last year, but they're looking busy now.. These last two with my tamron 300mm f2.8 60B + newly acquired sigma 1.4 x tc, non "apo" this time, Samsung NX20. Some comparison pics indicate it is pretty much as sharp as the apo one but not as well corrected - more fringing and haloes etc creeping in specifically at open apertures. This was a quick stacked tc's experiment - the sigma + adaptall 014F (=588mm focal length), f5.6 on the lens, 400ASA: Last edited by marcusBMG; 04-12-2018 at 11:21 AM.

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04-11-2018, 05:52 AM - 1 Like	#28111
stihlmania Site Supporter Join Date: Dec 2012 Location: Spring Branch, Tx Photos: Gallery \| Albums Posts: 705	Originally posted by Ducatigaz On the FA300/600mm lenses the rear filter is one of the lens elements the Sigma 300mm 2.8/500mm 4.5 are the same. I think this is correct, if anyone knows any different please let me know. On my A400, the filter does affect focus but if I remove the filter I can simply refocus and get a sharp image. I tested this with about 20 shots each, with my K-3II and my 1st D, and with my lens I can use or not use the filter ( I do put the holder back in either way) Normally I leave the original Pentax UV filter installed to help keep dust out of the lens....

04-11-2018, 06:44 AM - 1 Like	#28112
pete-tarmigan Veteran Member Join Date: Apr 2009 Location: Conception Bay South, New-fun-land Photos: Gallery Posts: 1,272	Originally posted by Ducatigaz On the FA300/600mm lenses the rear filter is one of the lens elements the Sigma 300mm 2.8/500mm 4.5 are the same. I think this is correct, if anyone knows any different please let me know. The user manual mentions the filter holder (p. 3) (49mm thread) but doesn't mention any mandatory filter or any filter included with the original lens. It does mention that the protective filter that can be screwed onto the front of the lens to protect the front element (p. 9), although it doesn't explicitly state that it was included in the original kit (150mm diameter for the 1200mm). The user manual covers the all four of the A super telephoto lenses (300mm f/2.8, 400mm f/2.8, 600mm f/5.6, 1200mm f/8). I have the 600mm. By the way, I have an original manual, so if anyone wants a PDF of the manual, I can scan it to make a more legible copy than is available on the web (a scan of a barely legible photocopy) and e-mail it to them. I'm not sure if there is a place on these forums where such manuals are made available.

04-11-2018, 08:05 AM	#28113
marcusBMG Site Supporter Join Date: Nov 2012 Location: North Wales Photos: Gallery \| Albums Posts: 2,868	Originally posted by pete-tarmigan I'm not sure if there is a place on these forums where such manuals are made available. Just PM Adam, Pete, he'll be happy to park a pdf in an approriate place. Update actually he prefers to respond to a thread here: https://www.pentaxforums.com/forums/3-site-suggestions-help/

04-11-2018, 10:04 AM	#28115
WPRESTO Loyal Site Supporter Join Date: Aug 2010 Location: Massachusetts Photos: Gallery \| Albums Posts: 59,104	Originally posted by csa "Woody" enjoying some peanut butter. Good to see an image posted by you. Has the dreadful cold there finally broken?

04-11-2018, 11:05 AM - 10 Likes	#28117
zzeitg Pentaxian Join Date: Sep 2014 Location: South Bohemia Photos: Gallery \| Albums Posts: 4,017	DA560

04-12-2018, 07:49 AM	#28118
csa Loyal Site Supporter Join Date: Aug 2014 Location: Montana mountains Posts: 10,133	Originally posted by WPRESTO Good to see an image posted by you. Has the dreadful cold there finally broken? Thanks! Had a couple of overcast but pleasant days; now today & tonight under a "winter" storm warning again! Snow expected. I guess no Spring here, this year.

04-12-2018, 07:51 AM	#28119
csa Loyal Site Supporter Join Date: Aug 2014 Location: Montana mountains Posts: 10,133	Zzeitg; I've never seen such awesome photos of birds! Sure makes me envious of that 560! You really bring the best out of that lens!

04-12-2018, 01:49 PM - 14 Likes	#28121
str8talk83 Veteran Member Join Date: May 2008 Location: Bluffton, SC Photos: Albums Posts: 674	Tried some bird in flight shots today. It's a shame the storks are so ugly...

04-12-2018, 03:00 PM	#28122
WPRESTO Loyal Site Supporter Join Date: Aug 2010 Location: Massachusetts Photos: Gallery \| Albums Posts: 59,104	Old saying (more-or-less as I remember it): The lowliest of birds is poetry in flight.

04-12-2018, 04:22 PM - 1 Like	#28123
Canada_Rockies Loyal Site Supporter Join Date: Nov 2007 Location: Sparwood, BC, Canada Photos: Gallery \| Albums Posts: 12,385	Originally posted by str8talk83 Tried some bird in flight shots today. It's a shame the storks are so ugly... Great shooting

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