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Forum: Pentax SLR Lens Discussion 06-18-2018, 05:27 AM  
Another good macro lens.
Posted By Precious
Replies: 15
Views: 1,203
Thank you very much for your comments and suggestions!
I guess I just want to make fresh winds in my macro photography to get better results and I thought that maybe a good new lens could make a difference.. :)
Forum: Pentax SLR Lens Discussion 06-15-2018, 12:33 AM  
Another good macro lens.
Posted By Precious
Replies: 15
Views: 1,203
Hello,

For about 7-8 years I am working with my oldie Pentax 100 mm F 2.8 macro lens (it was used as I bought it) and Pentax K-3 camera. Together with macro flash I achieved quite satisfying results. As the years pass, I have noticed that quality of pictures have changed, very often image is not in focus and so on. So I decided to buy a new macro lens for Pentax. I would like to ask for advice.
I have read that Pentax 100 mm is good as Tamron 90 mm lens, but maybe there are other lenses that are a bit better than Pentax 100 mm f 2.8? I prefer macro zoom lens. I would be very grateful for your answers!
Forum: Repairs and Warranty Service 04-16-2017, 11:09 PM  
Pentax K-3 shutter issues
Posted By Precious
Replies: 4
Views: 1,181
Hello,

Yesterday I noticed that all pictures made with my camera was all black or half black. When I turned mirror cleaning function, I have found the problem (see picture below). :(
I tried to turn on live view function but half of matrica is still covered.
Before 6 months I noticed that after longer photoshooting, shutter flutter appears. Then I brought my camera to guarantee center in Lithuania, unfortunately they said camera and shutter was fine. Now my Pentax K-3 guarantee is ended. I wanted to ask, how complicated this shutter problem is? My shutter count is about 23 000.
I think that shutter problem has not been established during first guarantee check?
Forum: Monthly Photo Contests 01-02-2017, 09:26 AM  
Summer sunrise and sunset
Posted By Precious
Replies: 2
Views: 322
"Sunrise/Sunset" contest
Forum: Repairs and Warranty Service 04-21-2016, 12:19 AM  
Pentax 100mm 2.8 lost it's sharpness
Posted By Precious
Replies: 14
Views: 1,565
Thank you for your comments. I will try to clean it once more and probably bring to the specialized repair shop. I love this lens because of it's sharpness, mostly used in macro photography, and it is very pity to loose one of it's best features.
Forum: Repairs and Warranty Service 04-17-2016, 06:00 AM  
Pentax 100mm 2.8 lost it's sharpness
Posted By Precious
Replies: 14
Views: 1,565
With K-3 I have been using for about 1,5 year. Only few months ago I noticed sharpness issues.
Forum: Repairs and Warranty Service 04-17-2016, 04:04 AM  
Pentax 100mm 2.8 lost it's sharpness
Posted By Precious
Replies: 14
Views: 1,565
Looking from outside - no fungus, no haze. Yes, I tried cleaning both sides of the lens.
I guess I will try to test for front/back focus and to bring it to repair.. :/
Thank you for your answers.
Forum: Repairs and Warranty Service 04-17-2016, 03:15 AM  
Pentax 100mm 2.8 lost it's sharpness
Posted By Precious
Replies: 14
Views: 1,565
Hello,
I have recently noticed that my lens Pentax 100mm 2.8 lost its sharpness. I use this lens with Pentax K-3.
I have been using this lens for about 6-7 years, it has never been dropped or damaged. Mostly I work with f 2.8.
Perhaps someone faced this problem and I wonder, if this could be fixed?
Thank you for your answers.
I am adding some photos. I think the problem is not with front or back focus, it's just very unsharp pictures, I tried to focus with auto and manual settings - problem still remains. :(
Forum: Photographic Technique 02-27-2016, 11:04 AM  
Macro Pentax 100mm + macro rings / macro bellows
Posted By Precious
Replies: 21
Views: 2,923
So, I guess there is no way to use bellows or macro rings normally with this lens. Thanks anyway :)
Forum: Photographic Technique 02-26-2016, 08:20 AM  
Macro Pentax 100mm + macro rings / macro bellows
Posted By Precious
Replies: 21
Views: 2,923
Yes, its the D FA 100mm f2.8 WR. I've never imagined about aperture ring before.. Its silly to ask, but what kind of aperture ring should be used?




---------- Post added 02-26-16 at 08:25 AM ----------



I checked today and the diaphragm is closed when I mount extension tube or bellows.. So there is the problem :)
Finally. Thanks, now I now where the problem was.
Forum: Photographic Technique 02-26-2016, 01:57 AM  
Macro Pentax 100mm + macro rings / macro bellows
Posted By Precious
Replies: 21
Views: 2,923
Thank you for your advice and explanation about macro bellows and macro rings. :)

So, I guess it is worth it to buy Raynox? :)
My Pentax 100mm gets 1:1 magnification, so I think Raynox-250 will be the better choice than Raynox-150?
Forum: Photographic Technique 02-24-2016, 04:41 AM  
Macro Pentax 100mm + macro rings / macro bellows
Posted By Precious
Replies: 21
Views: 2,923
Hello,
I wanted to ask for some advice :)
I've been in macro world for 3 or 4 years now with my Pentax 100mm macro lens. This lens gave me everything I wanted, but then I decided to get more magnifying and I bought macro bellows from ebay (those for 30-40 ) and also I got macro rings (yes, the cheapest ones), for a try. And nothing worked. I can't make any picture with macro rings and any picture with macro bellows, while using Pentax 100mm with my Pentax K-3. The view is blurry, focus doesn't work. I tired with my Metz flashlight, nothing helped, used tripod and different source of light.
I wanted to ask, If this is a problem with these cheap macro rings and bellows, that you can't make any picture, or it is with this Pentax macro lens? Maybe I should try with another lens, or to buy good macro bellows / macro rings?

Thank you for your advice.
I am sending few pictures. It doesn't change anything with different camera settings.
Forum: Pentax K-5 08-08-2013, 01:49 AM  
Pentax K-5 and infrared photography
Posted By Precious
Replies: 7
Views: 5,762
Hello everybody! :)

I wanted to ask for a little advice. I try to make infrared photos with my Pentax k-5 Hoya 72 filter ( using Sigma 17-70mm lens). As it is said in many forums and tutorials, I set WB manually (using grass), ISO 200, f 8-13, exposure 1-30 seconds and so on. In my computer I use photoshop CS5, I make changes in channel mixer, then auto levels, curves, then some changes in hue/saturations. And no matter what I do, the result is not that I wanted... Here are some examples of original pictures and after retouch. The main problem that the sky is never blue (I make it using hue/saturation), and the colours of the picture is very uneven.. I would be very grateful for your advice..
Forum: Pentax SLR Lens Discussion 01-10-2013, 12:51 PM  
Sigma 17-70mm VS Pentax 100mm 2.8 macro?
Posted By Precious
Replies: 12
Views: 1,593
Thank you for advice! Today i bought Pentax 100mm and I can say that there is a big difference between real macro and the other macro lens. :)
Forum: Pentax SLR Lens Discussion 01-09-2013, 02:25 PM  
Sigma 17-70mm VS Pentax 100mm 2.8 macro?
Posted By Precious
Replies: 12
Views: 1,593
I red a lot about Pentax 100mm and I guess it's worth buying..But I have found another problem :D
I found one person, who is selling Pentax 100mm 2.8 WR. He says it is in very good condition and he had used it for two years. Tommorow I am going to see that lens. But is it worth it to buy used lens? In my country it costs 699 $, and he is selling for 420 $.
Forum: Pentax SLR Lens Discussion 01-09-2013, 10:05 AM  
Sigma 17-70mm VS Pentax 100mm 2.8 macro?
Posted By Precious
Replies: 12
Views: 1,593
Thank You :)

It would be very very helpful!
Forum: Pentax SLR Lens Discussion 01-09-2013, 09:52 AM  
Sigma 17-70mm VS Pentax 100mm 2.8 macro?
Posted By Precious
Replies: 12
Views: 1,593
Oh, thank you very much! :))
I am sorry, I am quite new in this forum, where I could find these reviews? :)
Forum: Pentax SLR Lens Discussion 01-09-2013, 09:19 AM  
Sigma 17-70mm VS Pentax 100mm 2.8 macro?
Posted By Precious
Replies: 12
Views: 1,593
Hello,

I am wondering, if it's worth it to buy Pentax 100mm 2.8 macro WR lens ? For my macro photography I use Sigma17-70mm f/2.8-4 DC Macro OS. I know it's not real macro (1:2), but it's quite good.. Will I feel big difference between them? Has anyone used these lens for macro before? :)
Forum: Photographic Technique 05-03-2012, 09:40 PM  
Infrared photography with K-7
Posted By Precious
Replies: 5
Views: 1,902
Thank you for your advices!
Yesterday I tried to make photos, but only without colors it looks good.
When I process picture with channels in photoshop, colors become very distorted.
Forum: Photographic Technique 05-01-2012, 08:42 AM  
Infrared photography with K-7
Posted By Precious
Replies: 5
Views: 1,902
Hello,

I have problem with processing my infrared images. I use Hoya R72 filter on Sigma 17-70mm F2.8-4 DC Macro OS HSM (Pentax K-7).
Can someone tell me the best way to process IR image? I use suggestions that is given in many videos (youtube), but the result is very bad..
Here are some examples : ISO 100, f/8, exposure 10 sec.
Forum: Pentax SLR Lens Discussion 10-22-2011, 01:05 AM  
Need advice! Which lens
Posted By Precious
Replies: 1
Views: 702
Hello,

I have Pentax K100D super and i am looking for zoom lens. :)

I am intrested in Tamron 70-200mm http://www.dpreview.com/lensreviews/tamron_70-200_2p8_c16/. As I never had Tamron lens before, I know little about them. :confused: In some articles I read that this lens is very slow, because it doesn't have HSM (Hyper-Sonic Motor for faster shots) comparing with Sigma. I have two Sigma lenses that I am currently using, and I know, that not always you succeed to buy good Sigma lens at first time. But I also think about Sigma 70-200mm Sigma 70-200mm F2.8 EX DG Macro HSM II Lens Review: 1. Introduction: Digital Photography Review ..
The biggest problem is that, that before buying any of these lenses, I will not be able to try it, because my family member, who is going to buy it abroad, don't know about photography at all..Or maybe you can suggest some other lens?
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