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Forum: Post Your Photos! 01-14-2017, 04:50 PM  
Landscape Lion rocks on the Beach
Posted By channeler
Replies: 3
Views: 641
Really nice images of a beautiful area. Both great but I prefer the overall composition and colours of the first. Paul
Forum: Lens Clubs 12-29-2016, 10:07 AM  
The Mirror Lens Club!
Posted By channeler
Replies: 990
Views: 371,779
I don't think the adapters that prevent infinity focus would give enough extension on their own Tim. I think it would need some use of extension tube/tubes in the way goatsNdonkey was suggesting. The overhang of the flash housing on my K-30 is significant. Some regrets but I've decided to call it a day with the Rubinar. If I had had all the bits and pieces to hand to experiment I may have found a solution. I got to the point where I needed to make a decision re contacting the seller about a return or not. I have had an email from a member saying he found a way to create a 13mm spacer which enabled him to clear the flash housing of his K20D and he managed to retain infinity focusing. I don't know though which version of the Rubinar he has. Thanks for everyone's help and advice and hopefully others may find the posts useful if they are considering a Rubinar. For the moment I think I will be looking to experimenting with a Tamron 500mm F8. Perhaps I will revisit the 1000mm mirrors sometime in the future.

Paul
Forum: Lens Clubs 12-28-2016, 04:45 AM  
The Mirror Lens Club!
Posted By channeler
Replies: 990
Views: 371,779
Yes, I may give the tubes a shot. I just tried putting the M42 adapter into the lens mounting end of my Tamron 1.4x TC but couldn't get it to fit in place. Seem to be contacts that get in the way.
Forum: Lens Clubs 12-28-2016, 03:23 AM  
The Mirror Lens Club!
Posted By channeler
Replies: 990
Views: 371,779
Thanks for the suggestion Cooltouch but like Tim I am a bit wary of modifying the lens. I even found a webpage on how to remove the infinity stop on the Rubinar so you could focus to infinity when using an extension tube:

APM Information System

There were one or two other guides but without any images which made understanding the instructions more difficult. They did seem to indicate that the information re the danger of losing ball bearings given on the rugift site was incorrect:

Using Rubinar Lenses with various cameras / Rugift.com

Apart from my reluctance to take the risk the additional problem seems to be that there are some variations of this lens around so I can't be sure that these instructions would apply to all variants.

There is some useful general information about the lens on the Kremlin Optics site:

Rubinar 10/1000 Telephoto Lens

In particular it warns: " "CAUTION" these lenses may not work on all 35mm cameras with built in flash or other protruding devices on the front. The lens diameter at the mounting flange is 125mm or 62.5 mm radius. Measure your camera from the center of the lens mount to determine if any camera part extends more than 4 mm in front of the mounting ring within this radius."

There is also some useful information on the LZOS site:

LZOS - MC Rubinar-10/1000 camera lens

They mention various adapters for different cameras. I have written to them but I am not optimistic.

I have been on the edge of buying an M42 extension tube set Tim, The smallest tube in the set I came across was about 11mm. I'm not sure that it would give enough clearance to mount the lens and from everything I have read recently any tube seems to drastically affect infinity focus. I may still take the plunge just to give it a shot. Another member in an old post talked about stacking 20mm of tubes to use the Rubinar on his K20D. I don't know what he did about infinity focus, but I am trying to contact him about his experience. Another option is to try it with my tamron 1.4x TC (using the M42 adapter on the TC rather than the camera body) which may still maintain infinity focus? I may give that a shot later today.

I am going to have to make a decision soon as to whether to keep persevering to try to find a solution or to contact the Ebay seller that I purchased it from to see about returning it.

Paul
Forum: Lens Clubs 12-27-2016, 09:06 AM  
The Mirror Lens Club!
Posted By channeler
Replies: 990
Views: 371,779
I did read somewhere that these lenses were latterly produced in both M42 and PK fittings, though the quantities in the PK fitting must have been less as they just don't seem to come up for sale. The rear design of your version gives a lot more room for manoeuvre with flash housings. I don't think I have much option other than to buy an extension tube set and see how it works out. Not sure if any of the modern Pentax DSLRs would have enough clearance to mount the lens without an extender? As I mentioned, I hope the fact that the focusing ring goes a little past the infinity mark may give me a little leeway. I read instructions on one website on how to adjust infinity focus on the Rubinar 500mm if an extension ring had to be used, but the writer cautioned against trying it with the 1000 mm because the ball bearings that would come out with dismantling would be impossible to put back in place. I would have preferred to buy an auto PK set of extension tubes for use with other lenses but I think I'll have to stick with a manual M42 set as I suspect that I'd just run into other complications over the electrical contacts with a PK auto set. I did a lot of research re new mirror lenses like the Samyang 800mm (which would have been significantly cheaper) before opting for the Rubinar which seemed to offer better overall IQ. Fingers crossed I can get things to work. You may have already come across this but in my searches I came across what is supposed to be an English user manual here:

User English Manual for MC Rubinar 10/1000 MACRO Lens

Paul
Forum: Lens Clubs 12-27-2016, 05:49 AM  
The Mirror Lens Club!
Posted By channeler
Replies: 990
Views: 371,779
Hi Tim,

My version seems to be very similar to yours, but there seems to be a difference with the camera mount end. In the photo does yours have an extension ring on at the camera end or is that a fixed part of the lens? I have uploaded a photo of mine below. The other main difference is the size of the filters. FRont lens is concave. Yes, the focusing action is heavy but smooth.

With the "Made in Russia" on the tripod collar I wonder if my version was made for export. The tripod mount rotates around the lens clicking at 90 degree points, presumably so it can be fixed in place with the locking nut for landscape or portrait orientation. The focusing point seems to go a little beyond the infinity mark as far as the M mark. I read some lenses could focus "past infinity". If this is the case with this one I hope it might help if I have to use an extension tube.

Paul
Forum: Lens Clubs 12-26-2016, 09:33 AM  
The Mirror Lens Club!
Posted By channeler
Replies: 990
Views: 371,779
Difficult to say exactly how far the lens is fouling the flash housing. K-30 body does protrude a fair bit near the flash. Can't manage to even engage the thread. The hand grip also protrudes on the K-30 which also makes things more difficult. I have attached photos below along with a photo of the Rubinar showing the hood and filters. Please excuse the quality of the images. I just used my phone camera for quickness. Paul
Forum: Lens Clubs 12-26-2016, 07:44 AM  
The Mirror Lens Club!
Posted By channeler
Replies: 990
Views: 371,779
The filters that came with mine are small, apparently designed to fit inside the rear lens mounting. Now tried the K-30 but it seems the flash housing gets in the way of mounting the lens. So it looks like I will have to go down the extension tube route. I really didn't want to lose infinity focusing. How much is an extension tube going to reduce this by? I guess it's also going to impact on F10 capability as well? As I don't already possess an extension tube set I would probably be best getting a modern bayonet set (for greater flexibility with other lenses) and mounting the M42 adaptor on the front of one of those, but I'm not sure if this is practical or would cause other complications. I do already have a 1.4 TC so I understand this could be used to attach the Rubinar, but presumably that is going to affect IQ in the same way it would with other lenses. I wanted to use the Rubinar in particular for bird photography on lakes and wide rivers. Not sure if this is going to work now. Paul
Forum: Lens Clubs 12-23-2016, 04:11 PM  
The Mirror Lens Club!
Posted By channeler
Replies: 990
Views: 371,779
Thanks; glad about the advice for mounting the lens on the camera; I was wondering about the best way to approach that. The adapter for my camera has arrived now so I'll give it a go over the weekend. Is "the radar signature minimising lens hood" the standard one that ships with the lens? If so I have one of them; it's substantial, like the lens. I'll do a photo of it. What was the idea of the "radar signature minimising"? Paul
Forum: Lens Clubs 12-23-2016, 01:48 PM  
The Mirror Lens Club!
Posted By channeler
Replies: 990
Views: 371,779
Thanks, I'll try live view. Not something I have made any use of previously. At least this lens is making me explore my camera's functions more. Paul

---------- Post added 12-23-2016 at 08:51 PM ----------



Thanks. Pity that the K10D won't fit without an extension tube. Will see if the K-30 can handle the lens over the weekend. Paul

---------- Post added 12-23-2016 at 08:53 PM ----------



Thanks, will see if the lens can fit on my K-30 over the weekend. If not I guess I'll have to buy an extension tube set; but I really would prefer to keep infinity focus capability. Paul
Forum: Lens Clubs 12-21-2016, 09:56 AM  
The Mirror Lens Club!
Posted By channeler
Replies: 990
Views: 371,779
I have just come by a Rubinar 1000 F10. Looks in excellent condition. Not had a chance to try it out yet; waiting for an adaptor for my K-30. Hoping the camera body won't obstruct fitting the lens as the lens seems very wide. Still I also have a K10D I can try. Please can anyone offer me any pointers for getting the best out of this lens? Even fitting it onto the camera looks like it might be a task, avoiding cross threading. I guess a tripod is going to be essential. What are the best ways to approach focusing with this monster? Are there any particular camera settings which can help?

Paul
Forum: Pentax SLR Lens Discussion 03-06-2016, 04:42 AM  
Found a cheap and effective way to fix SDM failures.
Posted By channeler
Replies: 47
Views: 11,014
Hi, I found a variation on this (which I had come across in another post) worked for me for my DA*300. I pointed the lens horizontal, then down, then up, each time half pressing the shutter button to try to get autofocus. It took a long time to get the sdm back to life but it suddenly kicked in. I don't know it is was about trying to use gravity or just giving the autofocus alternative points. I had tried the other techniques before this without success ie: rapidly moving the lens back and forth in manual focus mode, keeping the lens cap on, pressing AF and spinning the focus. The first time I had a problem the lens had been stored in a camera bag for a couple of months. After I managed to revive it and left it for a few weeks I had the same seizure/sticking problem, but the lens revived more quickly after applying the above method. If I just leave it a day it will stick initially but revives very quickly. I don't think the lens is working quite as quietly as it did when first bought. I don't know what the fundamental problem is. I presume there is some kind of lubrication inside the lens mechanism. Can it dry up? The first time I experienced any problems I had taken the lens to France (so in a consistently warmer, but on that trip also wetter, climate) on holiday for a few weeks. I did not get the lens out of the bag. A few weeks after my return I had the first SDM problem. Anyhow, I am just going to try to exercise the lens regularly every day or two and see if that improves things.

Paul
Forum: Troubleshooting and Beginner Help 09-06-2015, 09:30 AM  
autofocus problem with DA*300 after firmware 1.06 update for K30
Posted By channeler
Replies: 8
Views: 1,201
I tried for a while the procedure of moving the focus ring back and forth. There seem to be a number of variations of this suggested on the forum. Some people say to set camera and lens to AF mode and rotate the focus ring back and forth while pressing the AF button. I was a bit concerned doing this as the manual says not to move the focusing ring while autofocusing. Others suggest just rotating the focus ring while in manual mode (camera or both camera and lens?). I tried both but SDM still dead. Then I came across a member (sorry can't remember who it was now) who had said by accident he had been pointing the camera down and autofocusing and then up and autofocusing and his sdm lens came back to life. I tried this a number of times autofocusing pointing down, then up, then level. Nothing at first but kept repeating the routine then suddenly there was movement in the SDM. Kept doing it for a while and lens now seems to be working as normal (touch wood!). Whether the earlier rotating procedure had also contributed to success I don't know. Anyhow I'm very relieved. Thanks for your help.

Paul
Forum: Pentax SLR Lens Discussion 09-06-2015, 03:35 AM  
Found a cheap and effective way to fix SDM failures.
Posted By channeler
Replies: 47
Views: 11,014
Did you put the lens in manual focus as well or was it in AF?

Paul
Forum: Pentax SLR Lens Discussion 09-06-2015, 01:05 AM  
Found a cheap and effective way to fix SDM failures.
Posted By channeler
Replies: 47
Views: 11,014
Hi, I have tried to apply what you have suggested to my DA*300 as the SDM has suddenly stopped working. How long do you have to spin the focus back and forth before the blinking green light goes off? Not managed to get mine to go off yet.

Paul
Forum: Troubleshooting and Beginner Help 09-06-2015, 12:26 AM  
autofocus problem with DA*300 after firmware 1.06 update for K30
Posted By channeler
Replies: 8
Views: 1,201
No haven't had any intermittent focusing problems. Cleaned contacts on the lens and camera this morning but no change. I have checked the AF/MF switch. I am in England so, if it has to be, I know of a Pentax repairer under an hour away. Now tried it on the K10D and SDM still doesn't work so firmware update confirmed as not relevant. Have started to try procedure with camera and lens in AF mode with lens cap still on and moving focus ring back and forth but blinking green light doesn't go out as someone suggested it should so no luck so far. Paul
Forum: Troubleshooting and Beginner Help 09-05-2015, 03:29 PM  
autofocus problem with DA*300 after firmware 1.06 update for K30
Posted By channeler
Replies: 8
Views: 1,201
Thanks transam879. Manual focus does work ok with the DA*300. The lens with and without the Tamron TC worked fine about 8 weeks ago when I last used them. Can't see why anything should have gone wrong in the meantime other than a random failing of the SDM motor, but perhaps that is what has happened and the firmware update is not significant. Thanks jatrax I will give the contacts a clean and see if that does anything. Tomorrow I will also put the lens on my old K10D that I still have as a further check. If the SDM motor has failed it will be very frustrating; the lens hasn't had that much use.

Paul
Forum: Troubleshooting and Beginner Help 09-05-2015, 09:41 AM  
autofocus problem with DA*300 after firmware 1.06 update for K30
Posted By channeler
Replies: 8
Views: 1,201
I updated the K30 firmware from 1.05 to 1.06. With 1.05 I have been using the DA*300 combined with a Tamron 1.4x teleconverter and they have been working fine (albeit with some autofocus hunting). After the update the Tamron 18-250 lens that I use for a lot of general photography seems to work fine. Today I thought I would try some wildlife photography and I put the DA*300 and Tamron 1.4x converter combination on the K30. Autofocus wouldn't work and though it seemed to be possible to alter aperture and fire the shutter at first, I later had problems even with these functions. I thought perhaps the problem was caused by the TC following the update, perhaps as I know the update was partly brought in for the new pentax 1.4x rear converter. I tried the K30 just with the DA*300 alone. It wouldn't autofocus or fire the shutter. I tried running the firmware update again. The problems persisted. Any ideas please? Is it possible to roll back to firmware 1.05?

Paul
Forum: Pentax K-30 & K-50 12-31-2013, 03:43 AM  
K-30 advice
Posted By channeler
Replies: 17
Views: 2,038
Many thanks everyone for all your helpful advice. I've gone ahead and ordered a K-30. Found a K-50 body for 30/50USD more so may have been tempted to go for that if I had seen the offer first. However, there doesn't seem much difference between the specs of the two. Paid 359/593USD for the K-30 body which is as good as it gets here in the UK with taxes. A K-5 ii would have been around 554/916USD and a K-5 iis would have been 634/1048USD. Will miss the top LCD display, and separate controls for metering and focus mode of the K-10D but I guess I will adjust to that. Reassured that the TCs should work. With a bit of luck the K-30 will arrive today.

Paul
Forum: Pentax K-30 & K-50 12-28-2013, 08:49 AM  
K-30 advice
Posted By channeler
Replies: 17
Views: 2,038
I currently have a K10D. I wouldn't be thinking about changing it apart from the fact that higher iso capability and thus the possibility of higher shutter speeds would be an advantage for wildlife photography. I guess an upgrade equivalent of the k10D would be a K-5 II? However, I don't want to spend that kind of money so I've been looking at the K-30. The body looks very angular. How is it for holding? Also does anyone know if Tamron 1.4x and 2.0x teleconverters will work ok with it (albeit with the same limitations as with the K10D) ? Be grateful for any help.

Paul
Forum: Post Your Photos! 10-17-2011, 03:08 PM  
Nature Striped Woodpecker
Posted By channeler
Replies: 2
Views: 2,242
A great sharp image. That's a striking looking bird.

Paul
Forum: Post Your Photos! 10-17-2011, 03:02 PM  
Landscape Headed West
Posted By channeler
Replies: 18
Views: 1,019
Great image Bob, I like the light and the contrasting colours of the prairie and cows.

Paul
Forum: Post Your Photos! 10-14-2011, 01:45 AM  
Misc Rough Seas off Brittany Coast
Posted By channeler
Replies: 4
Views: 4,527
Thanks Snappychappy. Thanks Jim and Heinrich. I agree about the flotation gear. I wouldn't want to be out at sea in a small boat without some flotation aid, but in those seas that day it was asking for trouble. I think some of the other passengers were not wearing flotation devices either.

Paul
Forum: Post Your Photos! 10-12-2011, 09:26 AM  
Misc Rough Seas off Brittany Coast
Posted By channeler
Replies: 4
Views: 4,527
Spent a couple of weeks in Southern Brittany last month. Weather was pretty good overall, but the wind picked up some days creating some fairly rough seas. Managed to find a sheltered spot at the point near Kerfany les Pins and found some entertainment watching small boats struggling against waves and winds to get out to sea.





Paul
Forum: Post Your Photos! 10-12-2011, 08:02 AM  
Nature Wapiti (Elk)
Posted By channeler
Replies: 22
Views: 4,413
Great images Heinrich. The only images of Elk I've managed so far have been close but obscured by trees or a clear shot of a dot in the distance.

Paul
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