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Forum: Pentax SLR Lens Discussion 11-28-2017, 06:52 PM  
Pentax 15-30mm focusing problems
Posted By catastrophe
Replies: 12
Views: 1,546
Just wondering, is it normal for the focus to change a lot with just a bit of rotation on the focus ring? It doesn't seem to happen with my other lenses but this one you have to be very precise. Or maybe it's not a problem but just characteristic of this lens....
Forum: Pentax SLR Lens Discussion 11-28-2017, 02:51 AM  
Pentax 15-30mm focusing problems
Posted By catastrophe
Replies: 12
Views: 1,546
Well, I'm sending it to CR Kennedy in Australia tomorrow for inspection and they will tune the camera and lens. Hope that will work out. So far it's much sharper than my Nikon D7100 with Sigma 24-105mm.
Forum: Pentax SLR Lens Discussion 11-27-2017, 03:22 PM  
Pentax 15-30mm focusing problems
Posted By catastrophe
Replies: 12
Views: 1,546
I turned IBIS off, on tripod, point select AF focused on centre. Live view gives more consistent results than viewfinder, with viewfinder it's all over the place, sometimes when focusing on closer object, the lens will decide to focus further back throwing the focus off. Since 1mm rotation of the focus ring already makes big difference, I guess focusing is too critical to rely on AF? btw, I'm doing the tests on f2.8, maybe f8 will help....
Forum: Pentax SLR Lens Discussion 11-27-2017, 04:34 AM  
Pentax 15-30mm focusing problems
Posted By catastrophe
Replies: 12
Views: 1,546
Hi guys,

I had a Nikon D750 with the Tamron 15-30mm but recently decided to switch back to Pentax (I had a K5 before) Now with the Pentax K1 and the 15-30mm, I can say that the build and sharpness is better. But the problem is that the 15-30mm seems to have focusing issues that my Tamron didn't have. On the Nikon, it focuses accurately and I don't remember the focus ring being so sensitive that moving just a little results in big changes. It focuses better on 15mm than at longer focal lengths. I first thought I might have a soft copy, but after manual focusing I see the problem was with AF.

I tried all things like updating camera firmware, AF fine tuning, using 33 point, 9 point, point select focus modes, but it's still not accurate and consistent. Not really sure if it's camera problem or lens problem as I have no other lens on Pentax at the moment. Really a shame because the sharpness is good, ONLY when it focuses properly! Manual is the only way to go right now...

Just wondering if anyone have issues with their 15-30mm too? Is the focus throw really short that just 1mm turn of the ring will throw an image out of focus? I remember the Samyang 14mm which had a much larger focus throw so you can be precise with manual focus.

Thanks in advance.
Forum: Pentax K-3 Photo Contest 05-23-2014, 05:12 PM  
Landscape Twilight Ribbons
Posted By catastrophe
Replies: 20
Views: 2,164
Thanks for the kind comments! It was really a special moment that doesn't happen too often.
Forum: Pentax K-3 Photo Contest 05-22-2014, 06:36 PM  
Landscape Twilight Ribbons
Posted By catastrophe
Replies: 20
Views: 2,164
This image was taken at Mt Rainier at Tipsoo lake at sunset. It was such a perfect and unforgettable moment and it remains my favorite shot. There was a lenticular cloud just before sunset and I was hoping it'll stay there for sunset, but it disappeared but this cloud streak started forming and was lit bright red at sunset. There was a lenticular the next day but this was still much better. I felt sorry for the other photographer whose battery died just as the show was at climax, which lasted only about 2 minutes.

Thanks for looking and I'll appreciate any comments!
Forum: Pentax SLR Lens Discussion 01-10-2014, 11:39 PM  
Sigma 8-16mm vs 10-20mm old and new versions
Posted By catastrophe
Replies: 28
Views: 5,257
Thanks for the samples, your copy looks great! Hopefully mine will be as good or better!
Forum: Pentax SLR Lens Discussion 01-10-2014, 06:08 AM  
Sigma 8-16mm vs 10-20mm old and new versions
Posted By catastrophe
Replies: 28
Views: 5,257
Please do let me know how's the lens sharpness especially for the 10-20mm. I'm about to get the 10-20 3.5 since I need filters, hearing reports where some copies are sharp to the corner but more reports of corner softness....which is holding me back at the moment.
Forum: Pentax SLR Lens Discussion 12-28-2013, 02:49 PM  
Sigma 8-16mm vs 10-20mm old and new versions
Posted By catastrophe
Replies: 28
Views: 5,257
Thanks guys for the suggestions! I'm leaning towards the 8-16mm but in the end it all comes down to filters. Not so much CPL but NDs are essential as I do a lot of long exposures.

I have found these links in regards to using filters on the 8-16mm:

How to guide for filtering Sigma 8-16 on the cheap

so i herd u liek filterz (or, how to use filters on the Sigma 8-16mm) - Canon Digital Photography Forums

ND Filter Sigma 8-16mm: Nikon DX SLR (D40-D90, D3000-D7100) Talk Forum: Digital Photography Review

It looks like I can use circular filters on the first 2 methods, and square filters on the last.

Does the Cokin filter holder only take square filters? I would prefer circular ones as I know more reliable brands, not too familiar with square filters. And will the Cokin holder hold other brands of filters such as Lee or Hitech as I heard they are better than Cokin.
Forum: Pentax SLR Lens Discussion 12-28-2013, 03:32 AM  
Sigma 8-16mm vs 10-20mm old and new versions
Posted By catastrophe
Replies: 28
Views: 5,257
Hey guys,

I'm having a hard time deciding deciding between the 3 lenses as my UWA. I currently have a Pentax 15mm and love it for it's amazing sunburst and flare resistance. However, I find there are times that it's not wide enough and I need at least 12mm or wider.

I'm torn between the 3 lenses as they all seem to have their advantages and disadvantages.

8-16mm
Pros: sharpness, flare resistance and ability to produce sunburst
Cons: unable to take filters (although I have read that you can use a Cokin filter holder and 77mm adapter ring as a solution, but does it take normal circular 77mm filters or do I need to use the square ones made by Cokin? I prefer using higher quality brands.

10-20mm 4.5-5.6
Pros: sharpness, price
Cons: poor rendition of the sun and flare control

Looks like pretty bad rendering of the sun:
Bare Trees and Sun - Sigma 10-20mm Wide Angle Lens

10-20mm 3.5
Pros: better flare control and rendition of the sun than the older model
Cons: 82mm filter, sharpness worse than the old model

I think this might be taken with the f3.5 ver, the sunburst looks pretty good:
Last Summer | HDRshooter

I would definitely choose the 8-16mm if I can use filters on it, but if I can't, then it's not an option since ND filters are very important for me.

Maybe I should also consider the Pentax 12-24mm?

Any suggestions from owners of these lenses especially in regards to the filter use, flare control etc?

Thanks

Aaron
Forum: Pentax Camera and Field Accessories 12-23-2013, 04:07 PM  
Weird banding issue using ND filter?
Posted By catastrophe
Replies: 26
Views: 5,592
They are all with filters, with exposures of longer than 10 secs.
Forum: Pentax Camera and Field Accessories 12-22-2013, 06:25 PM  
Weird banding issue using ND filter?
Posted By catastrophe
Replies: 26
Views: 5,592
Thanks guys for the help. It's a multi-coated BW filter so it's really likely it's caused by light leakage from the viewfinder instead of a low quality filter. Will try long exposures again with the eye piece and hopefully there's no problem....
Forum: Pentax Camera and Field Accessories 12-20-2013, 05:50 AM  
Weird banding issue using ND filter?
Posted By catastrophe
Replies: 26
Views: 5,592
Hi,

Anyone know what may be causing this weird banding issue when using a B+W 10 stop ND filter? It happens randomly but once it does, it seems to occur every shot even though I ensure the lens and filter is clean. I'm using a Pentax 15mm. Sometimes it's subtle but sometimes it's so horrible that it destroys the image...
Forum: Photo Critique 12-02-2013, 04:11 AM  
Landscape Landscape photographer of the year entries
Posted By catastrophe
Replies: 20
Views: 2,348
Thank you!:)
Forum: Photo Critique 12-01-2013, 11:16 PM  
Landscape Landscape photographer of the year entries
Posted By catastrophe
Replies: 20
Views: 2,348
Well, I'm actually in the top 20 now out of over 800 entries! And BOTH of my portfolios got in!

Australian Photography: Iceland - Dramatic and Otherwordly

Australian Photography: Dreamscapes

I might even win 2 prizes lol, just have to wait until end of Jan for the results! :lol:
Forum: Photo Critique 11-14-2013, 06:25 AM  
Landscape Landscape photographer of the year entries
Posted By catastrophe
Replies: 20
Views: 2,348
Well, I've just submitted my entries after agonizing over my choices. It's really tough to narrow down and after speaking to a friend of mine who happens to be a judge for competitions (not this one though), he suggested I should enter with unique rather than just beautiful photos. I've finally narrowed down to these as my entries:

Australian Photography: Colours of nature

From all these:

competition - a set on Flickr

Thanks everyone for the suggestions! I am really aiming to win this one!

Aaron
Forum: Post Your Photos! 11-11-2013, 04:04 PM  
Landscape Kerlingarfjoll - Iceland
Posted By catastrophe
Replies: 3
Views: 830
Thanks for looking as always! In terms of geological features, Iceland is probably the most diverse in such a small land. You find the landscape change constantly as you drive around, it basically changes every 30 minutes as opposed to in Australia you find the landscape almost the same no matter how long you drive....
Forum: Post Your Photos! 11-10-2013, 07:22 PM  
Landscape Kerlingarfjoll - Iceland
Posted By catastrophe
Replies: 3
Views: 830
Alien landscapes of kerlingarfjoll in Iceland, most amazing hike I've ever done. You can feel the heat coming off the ground and the place is totally unreal...





IMGP3835 by sephiroth.zer0, on Flickr


IMGP3842 by sephiroth.zer0, on Flickr


IMGP3847_8_9 by sephiroth.zer0, on Flickr


IMGP3852_3_3 by sephiroth.zer0, on Flickr


IMGP3863 by sephiroth.zer0, on Flickr




IMGP3870 by sephiroth.zer0, on Flickr


IMGP3884 by sephiroth.zer0, on Flickr


IMGP3888 by sephiroth.zer0, on Flickr


IMGP3915 by sephiroth.zer0, on Flickr


IMGP3927 by sephiroth.zer0, on Flickr


IMGP3933 by sephiroth.zer0, on Flickr
Forum: Photo Critique 11-02-2013, 12:18 AM  
Landscape Mt Ranier National Park - Autumn
Posted By catastrophe
Replies: 6
Views: 877
Great location, but these two will improve the shot:

Composition perspective - Maybe find a better foreground that leads into the scene?
Technical perspective - Shoot earlier in the morning where light is more pleasing, and chance of mist and fog. Use a Graduated ND to bring down exposure on the mountain top (very important as it's much brighter than the rest of the scene), If not, use HDR but don't overdo it.

Here's my take of Reflection lakes, I like the foggy effect but when it's clear, it's pretty but boring.


IMGP6568 by sephiroth.zer0, on Flickr


IMGP6596_6_7 by sephiroth.zer0, on Flickr

I find Tipsoo lake over in Sunrise a better location as I had much better conditions and better foreground every time I was there.




IMGP6115_6_7-2 by sephiroth.zer0, on Flickr



IMGP6150_1_2 by sephiroth.zer0, on Flickr
Forum: Photo Critique 10-30-2013, 11:42 PM  
Landscape Landscape photographer of the year entries
Posted By catastrophe
Replies: 20
Views: 2,348
Good point, thanks for pointing that out! Could be a lifesaver:lol:
Forum: Photo Critique 10-30-2013, 04:49 PM  
Landscape Landscape photographer of the year entries
Posted By catastrophe
Replies: 20
Views: 2,348
That waterfall shot is actually behind the waterfall and is really easy to get to. Problem is the spray behind the waterfall, tourists, and the car park being so close....if the car park and people wasn't there, I'll definitely enter this. But it's still a good shot.



Thanks for taking to time to fav the ones you like. As for the HDR, I do agree that some of them are overdone a bit to be eye catchy, but I can always tone them down.
Forum: Post Your Photos! 10-30-2013, 04:38 AM  
Landscape Hveravellir Geothermal pools
Posted By catastrophe
Replies: 8
Views: 1,008
Yes Iceland certainly has some of the most bizarre landscapes that you can only dream of. Most people's reaction when landing on Iceland is that they arrived at the moon. In fact, people train there in winter before going to the moon as it's the closest environment to the moon.:lol:
Forum: Photo Critique 10-30-2013, 12:48 AM  
Landscape Landscape photographer of the year entries
Posted By catastrophe
Replies: 20
Views: 2,348
Thank you everyone who for taking the time to look through them and comment! That really helped me narrowed down my choices. I'm confident that I can get to the top 10 but I'm aiming for 1st place:lol:

As for the lens, yes every one of them was taken with the Pentax 15mm limited. It stays on my camera 90% of the time.:)
Forum: Photo Critique 10-29-2013, 03:06 AM  
Landscape Landscape photographer of the year entries
Posted By catastrophe
Replies: 20
Views: 2,348
Thank you for taking the time and choosing! It means a lot to me and I really appreciate it!:)
Forum: Post Your Photos! 10-28-2013, 09:48 PM  
Landscape Hveravellir Geothermal pools
Posted By catastrophe
Replies: 8
Views: 1,008
My favorite place and landscape in Iceland, Hveravellir, Missed a sunset there but the sunrise the next day is amazing as well, double rainbows and sun rainbows...lovely free geothermal hotsprings too!




IMGP3578 by sephiroth.zer0, on Flickr


IMGP3574 by sephiroth.zer0, on Flickr





IMGP3590_1_2 by sephiroth.zer0, on Flickr


IMGP3594 by sephiroth.zer0, on Flickr


IMGP3631 by sephiroth.zer0, on Flickr


IMGP3632 by sephiroth.zer0, on Flickr


IMGP3674 by sephiroth.zer0, on Flickr


IMGP3620_1_2-2 by sephiroth.zer0, on Flickr


IMGP3627 by sephiroth.zer0, on Flickr


IMGP3699 by sephiroth.zer0, on Flickr


IMGP3718 by sephiroth.zer0, on Flickr


IMGP3798 by sephiroth.zer0, on Flickr
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