300mm/2.8 images, only at 2.8

cwood · 12-23-2009, 10:38 AM

I found a significant improvement at F3.2 and F3.5 so I rarely shot it at F2.8.

F3.5

This one is one of the rare images I took wide open at F2.8. I missed the focus on the birds eye slightly but you can see that part of the flower comes out in sharp focus.

**StephenMerola** · 12-23-2009, 10:40 AM

excellent photos.

netuser · 12-23-2009, 01:56 PM

Originally posted by StephenMerola

excellent photos.

Indeed

Mike.P® · 12-23-2009, 03:58 PM

I bought my A* 300mm f2.8 purely to use with the 1.4x-L and 2x-L teleconverters.
I don't think I actually have any shots taken at f2.8.

Pentax K10D, Pentax A* 300mm f2.8 (f4)

Pentax K10D, Pentax A* 300mm f2.8 and Pentax 2X-L Teleconverter. 600mm Handheld. (f5.6)

netuser · 01-04-2010, 04:05 PM

I'm thinking of 500/4.5 but now also on 300/2.8 with 1.4 and 2x converters for versatility. You all are to blame

Sigma 300/2.8 is a no brainer, just use their 1.4 and 2x converters.

Now, for FA 300/2.8 and besides the 1.7 from Pentax, and for autofocus which 1.4 and 2x should I use ? Anyone ?
(To use on k-7)

netuser · 01-05-2010, 03:59 AM

Originally posted by netuser

...
For FA 300/2.8 and besides the 1.7 from Pentax, and for autofocus which 1.4 and 2x should I use ?
(To use on k-7)

Anyone ?

xjjohnno · 01-05-2010, 04:14 AM

Tamron adaptall 3 mount SP300 f2.8 the 60B.
[IMGWIDELEFT]http://www.xjgarage.org/photos/january2010/slides/PICT4433.JPG[/IMGWIDELEFT]
[IMGWIDELEFT]http://www.xjgarage.org/photos/january2010/slides/PICT4343.JPG[/IMGWIDELEFT]

flash1100 · 01-05-2010, 05:37 AM

Originally posted by borno

I had a FA*300 f2.8 (sold my motorcycle to buy it)

You did WHAT

So you didn't have a child or wife to sell?

**StephenMerola** · 01-05-2010, 07:30 AM

Originally posted by xjjohnno

Tamron adaptall 3 mount SP300 f2.8 the 60B.
[IMGWIDELEFT]http://www.xjgarage.org/photos/january2010/slides/PICT4433.JPG[/IMGWIDELEFT]
[IMGWIDELEFT]http://www.xjgarage.org/photos/january2010/slides/PICT4343.JPG[/IMGWIDELEFT]

Nice photos, but wow, that is some serious CA and PF on that first one. I have recently aquired this lens, but due to the crazy weather have had few chances to use it.

cwood · 01-05-2010, 09:10 AM

Originally posted by netuser

I'm thinking of 500/4.5 but now also on 300/2.8 with 1.4 and 2x converters for versatility. You all are to blame

Sigma 300/2.8 is a no brainer, just use their 1.4 and 2x converters.

Now, for FA 300/2.8 and besides the 1.7 from Pentax, and for autofocus which 1.4 and 2x should I use ? Anyone ?
(To use on k-7)

I used the Tamron 1.4x ALL the time with mine and it was good. I also tried (borrowed) the Pentax AF1.7x and it was also very good. If I had kept the lens I would have bought the Pentax 1.7x.

Unfortunately since the camera is unaware of the tamron converter there is no exif information to identify which shots had the converter... also it does not accurately display your true aperture. With the Pentax 1.7 all of that information is preserved. As a result I KNOW I used the TC for all my surf shots but I don't always know the other times I used it so I have just shown you a couple of random surf photos.

Here's some shots with the tamron 1.4x

100% crop

So I actually did sell this lens and the reason I did is because I also have a Canon 1DmkIII and the Canon 1 series cameras can autofocus an F9 lens... therefore I can stack my Canon TC's (1.4x PLUS 2x = 840mm F9) and still maintain autofocus. Equivalent 35mm FOV for that setup is 1092mm

netuser · 01-05-2010, 09:14 AM

Thanks Kunik, also another question, if possible, ... did you use the lens with any 2x converter ? if so, which one and what were the results ?

cwood · 01-05-2010, 09:18 AM

Originally posted by netuser

Thanks Kunik, also another question, if possible, ... did you use the lens with any 2x converter ? if so, which one and what were the results ?

I couldn't find a 2x I was happy with so ... No.

cwood · 01-05-2010, 09:21 AM

Actually if Pentax had made a good 2x TC that would maintain AF I would have probably kept the lens. 300mm was usually too short for me but I couldn't afford the extra $5000 to get the 600 F4. So if I could have shot the 300mm with a 2x to get 600mm F5.6 I would have been happy.

netuser · 01-05-2010, 09:23 AM

That's a point in favor of the sigma, they have a 2x that autofocus the lens to 600/5.6.
I prefer the Pentax FA but I will have to find a 2x converter before I decide on it ...... Any hints ?

cwood · 01-05-2010, 09:30 AM

Originally posted by netuser

That's a point in favor of the sigma, they have a 2x that autofocus the lens to 600/5.6.
I prefer the Pentax FA but I will have to find a 2x converter before I decide on it ...... Any hints ?

I'd be curious to see the results if anyone has tried stacking the 1.7x and 1.4x on the k-7 with ANY F2.8 lens. I'm pretty sure that the K-7 would autofocus that combo but I wonder if the image would look OK?

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12-23-2009, 10:38 AM	#16
cwood Veteran Member Join Date: Aug 2008 Location: California Posts: 851	I found a significant improvement at F3.2 and F3.5 so I rarely shot it at F2.8. F3.5 This one is one of the rare images I took wide open at F2.8. I missed the focus on the birds eye slightly but you can see that part of the flower comes out in sharp focus.

12-23-2009, 10:40 AM	#17
StephenMerola Site Supporter Join Date: Feb 2009 Location: Wisconsin Photos: Albums Posts: 423	excellent photos.

12-23-2009, 01:56 PM	#18
netuser Veteran Member Join Date: Oct 2008 Location: Azores Islands, Portugal Photos: Gallery Posts: 2,236 Original Poster	Originally posted by StephenMerola excellent photos. Indeed

12-23-2009, 03:58 PM	#19
Mike.P® Veteran Member Join Date: Mar 2008 Location: New Milton, Hampshire, UK Photos: Gallery \| Albums Posts: 2,154	I bought my A* 300mm f2.8 purely to use with the 1.4x-L and 2x-L teleconverters. I don't think I actually have any shots taken at f2.8. Pentax K10D, Pentax A* 300mm f2.8 (f4) Pentax K10D, Pentax A* 300mm f2.8 and Pentax 2X-L Teleconverter. 600mm Handheld. (f5.6)

01-04-2010, 04:05 PM	#20
netuser Veteran Member Join Date: Oct 2008 Location: Azores Islands, Portugal Photos: Gallery Posts: 2,236 Original Poster	I'm thinking of 500/4.5 but now also on 300/2.8 with 1.4 and 2x converters for versatility. You all are to blame Sigma 300/2.8 is a no brainer, just use their 1.4 and 2x converters. Now, for FA 300/2.8 and besides the 1.7 from Pentax, and for autofocus which 1.4 and 2x should I use ? Anyone ? (To use on k-7)

01-05-2010, 03:59 AM	#21
netuser Veteran Member Join Date: Oct 2008 Location: Azores Islands, Portugal Photos: Gallery Posts: 2,236 Original Poster	Originally posted by netuser ... For FA 300/2.8 and besides the 1.7 from Pentax, and for autofocus which 1.4 and 2x should I use ? (To use on k-7) Anyone ?

01-05-2010, 04:14 AM	#22
xjjohnno Veteran Member Join Date: Jan 2009 Location: Melbourne Australia Photos: Gallery Posts: 2,115	Tamron adaptall 3 mount SP300 f2.8 the 60B. [IMGWIDELEFT]http://www.xjgarage.org/photos/january2010/slides/PICT4433.JPG[/IMGWIDELEFT] [IMGWIDELEFT]http://www.xjgarage.org/photos/january2010/slides/PICT4343.JPG[/IMGWIDELEFT]

01-05-2010, 05:37 AM	#23
flash1100 Forum Member Join Date: Sep 2006 Location: Perth West Australia Photos: Gallery Posts: 97	Originally posted by borno I had a FA*300 f2.8 (sold my motorcycle to buy it) You did WHAT So you didn't have a child or wife to sell?

01-05-2010, 07:30 AM	#24
StephenMerola Site Supporter Join Date: Feb 2009 Location: Wisconsin Photos: Albums Posts: 423	Originally posted by xjjohnno Tamron adaptall 3 mount SP300 f2.8 the 60B. [IMGWIDELEFT]http://www.xjgarage.org/photos/january2010/slides/PICT4433.JPG[/IMGWIDELEFT] [IMGWIDELEFT]http://www.xjgarage.org/photos/january2010/slides/PICT4343.JPG[/IMGWIDELEFT] Nice photos, but wow, that is some serious CA and PF on that first one. I have recently aquired this lens, but due to the crazy weather have had few chances to use it.

01-05-2010, 09:10 AM	#25
cwood Veteran Member Join Date: Aug 2008 Location: California Posts: 851	Originally posted by netuser I'm thinking of 500/4.5 but now also on 300/2.8 with 1.4 and 2x converters for versatility. You all are to blame Sigma 300/2.8 is a no brainer, just use their 1.4 and 2x converters. Now, for FA 300/2.8 and besides the 1.7 from Pentax, and for autofocus which 1.4 and 2x should I use ? Anyone ? (To use on k-7) I used the Tamron 1.4x ALL the time with mine and it was good. I also tried (borrowed) the Pentax AF1.7x and it was also very good. If I had kept the lens I would have bought the Pentax 1.7x. Unfortunately since the camera is unaware of the tamron converter there is no exif information to identify which shots had the converter... also it does not accurately display your true aperture. With the Pentax 1.7 all of that information is preserved. As a result I KNOW I used the TC for all my surf shots but I don't always know the other times I used it so I have just shown you a couple of random surf photos. Here's some shots with the tamron 1.4x 100% crop So I actually did sell this lens and the reason I did is because I also have a Canon 1DmkIII and the Canon 1 series cameras can autofocus an F9 lens... therefore I can stack my Canon TC's (1.4x PLUS 2x = 840mm F9) and still maintain autofocus. Equivalent 35mm FOV for that setup is 1092mm

01-05-2010, 09:14 AM	#26
netuser Veteran Member Join Date: Oct 2008 Location: Azores Islands, Portugal Photos: Gallery Posts: 2,236 Original Poster	Thanks Kunik, also another question, if possible, ... did you use the lens with any 2x converter ? if so, which one and what were the results ?

01-05-2010, 09:18 AM	#27
cwood Veteran Member Join Date: Aug 2008 Location: California Posts: 851	Originally posted by netuser Thanks Kunik, also another question, if possible, ... did you use the lens with any 2x converter ? if so, which one and what were the results ? I couldn't find a 2x I was happy with so ... No.

01-05-2010, 09:21 AM	#28
cwood Veteran Member Join Date: Aug 2008 Location: California Posts: 851	Actually if Pentax had made a good 2x TC that would maintain AF I would have probably kept the lens. 300mm was usually too short for me but I couldn't afford the extra $5000 to get the 600 F4. So if I could have shot the 300mm with a 2x to get 600mm F5.6 I would have been happy.

01-05-2010, 09:23 AM	#29
netuser Veteran Member Join Date: Oct 2008 Location: Azores Islands, Portugal Photos: Gallery Posts: 2,236 Original Poster	That's a point in favor of the sigma, they have a 2x that autofocus the lens to 600/5.6. I prefer the Pentax FA but I will have to find a 2x converter before I decide on it ...... Any hints ?

01-05-2010, 09:30 AM	#30
cwood Veteran Member Join Date: Aug 2008 Location: California Posts: 851	Originally posted by netuser That's a point in favor of the sigma, they have a 2x that autofocus the lens to 600/5.6. I prefer the Pentax FA but I will have to find a 2x converter before I decide on it ...... Any hints ? I'd be curious to see the results if anyone has tried stacking the 1.7x and 1.4x on the k-7 with ANY F2.8 lens. I'm pretty sure that the K-7 would autofocus that combo but I wonder if the image would look OK?