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Forum: Pentax Medium Format 4 Days Ago  
TTL Not Working
Posted By asahijock
Replies: 20
Views: 645
It sounds as if you want to be a hybrid user( develop film but then scan as opposed darkroom printing). B&W developing requires very little equipment and you can make adjustments for temperature changes whereas C41 colour film really requires that you have the means of holding the temperature of the developer at a constant 100F or 38.8 C

For B&W you'll need a lightproof room( wait until dark then a cupboard under the stairs or similar is fine) or a changing bag to load the film - once loaded the rest is done in normal light. A tank and reel and developer plus fixer. Access to water is also needed and the kitchen is as good a place as any to do the processing.

Colour is no more difficult., except for the need for 100F/38.8C but I'd try B&W initially.

Given that this site is predominantly digital, it may not be the best for analogue advice on processing. I'd do 2 things

1. Buy a book on B&W processing
2. Join the likes of Photrio which has a lot of analogue users who collectively have a lot of knowledge on film processing

You will save a fortune in even the medium term in processing costs and have complete control.

Best of luck

asahijock
Forum: Pentax Medium Format 07-09-2018, 12:41 PM  
Lens cleaning / service in the uk?
Posted By asahijock
Replies: 8
Views: 507
OP on that basis and because it is free you might want to try and expose the suspect lens to a load of UV before considering an expensive lens service. Few places better than the U.K. at the moment for massive doses of UV:).

asahijock
Forum: Pentax Medium Format 07-07-2018, 10:12 AM  
Pentax 645n | I want to shoot film
Posted By asahijock
Replies: 25
Views: 1,294
No problem I thought that was probably the case

asahijock
Forum: Pentax Medium Format 07-07-2018, 04:28 AM  
Pentax 645n | I want to shoot film
Posted By asahijock
Replies: 25
Views: 1,294
You gave my quote but then your reply seems to be unrelated to that quote. Were you confusing me with someone else? I don't have a digital camera. I was unsure of the comparison with an APSC sensor of which I know nothing, being a 24 carat dyed-in-the-wool film person. I have in fact a P645N film camera.

My post was simply to say that the size of a "good, high resolution print is related to the size of the negative and on that we are agreed. A 645 negative will produce in my opinion a pretty good 16x20 print so the real question which only the original poster can answer is how big does he intend to print.

He appears to have answered that question in his latest post.

asahijock
Forum: Pentax Medium Format 07-04-2018, 04:30 PM  
Pentax 645n | I want to shoot film
Posted By asahijock
Replies: 25
Views: 1,294
As has already been said it depends on the size of the print. A 645 negative will give you enough resolution for a pretty big print. One poster mentioned 16 x20 prints and while I cannot say you can go bigger I'd be very surprised if you couldn't and still have great prints. 16x20 is pretty big. How many prints are you likely to make above that size?

asahijock
Forum: Pentax Medium Format 05-27-2018, 02:57 PM  
Pentax 645N - 120 film in 220 magazine ?
Posted By asahijock
Replies: 31
Views: 16,241
Thanks for the reply. A bleak outlook. Already on e-bay the 220 inserts considerably outnumber the 120s. The problem with 220 spares is that if you cannot obtain another 120 insert but wish to have a second insert then the vital part of the pressure plate cannot be transferred without alleged potential damage to the motor. No pressure plate then no second insert

asahijock
Forum: Pentax Medium Format 05-27-2018, 09:46 AM  
Pentax 645N - 120 film in 220 magazine ?
Posted By asahijock
Replies: 31
Views: 16,241
Thanks for the pics, lightproof. There clearly is a lip that can be seen on the 220 and as you say there is a corresponding lip at the other end, whereas the 120 has no lip. What remains to be discovered from "converters' experiences is how much of a strain this places on the motor. As far as I know 220 film is no longer produced and while I have heard that some can be purchased in Japan, it has disappeared from other markets. It is impossible to tell what the e-bay sales for 220 inserts are like but there are a lot of them about and they are a lot cheaper than 120 inserts. I'd imagine a lot of buyers buy them thinking that they can safely convert to 120 but buyers are storing up motor problems in the long run according to Eric.

I wonder if Eric has actual known examples of motor problems which stem from inserts that have been converted?


Thanks
asahijock
Forum: Pentax Medium Format 05-22-2018, 02:06 PM  
Pentax 645N - 120 film in 220 magazine ?
Posted By asahijock
Replies: 31
Views: 16,241
Photos would be welcome. I have just looked again at stocks in the two main U.K. dealers who sell inserts and neither have any inserts. Reverting to e-bay, nearly all such inserts now come from Japan. There was one from a U.K. photographic dealer and it was an insert converted from 220 with the claim that it was a perfectly safe conversion. So it would appear that even camera dealers are unaware of the dangers as quoted by Eric.

The final point I'd make is that there are almost no 220 films left. Based on Eric's quote such inserts should have almost no sales and soon should be virtually scrap and yet there are plenty for sale.

Finally as this thread is several years old, can I ask that those who have converted such as George Hazelton and others, please give us their experience of what if any problems they have since experienced with the camera's motor in the ensuing years that have now passed.

Thanks

asahijock
Forum: Pentax Medium Format 05-22-2018, 01:07 PM  
Lines On 645N Negatives
Posted By asahijock
Replies: 35
Views: 3,620
I have just read this thread as I have a P645N also and had failed to notice that it was many years old. I even made a contribution myself . If the OP did find a solution it is always a pity when he/she doesn't come back with what the solution was as it may help others who run into the same issue.

asahijock
Forum: Pentax Medium Format 05-22-2018, 12:52 PM  
The 645 as the best all-around camera
Posted By asahijock
Replies: 10
Views: 1,057
There are some of us for whom digital has still not come along and even a few who still use enlargers and chemicals in a darkroom. I am one such person and certainly would be interested in both your views and writings. I have the P645N and the FA 75mm and A 45mm but I am still toying with idea of a longer lens such as the 150mm or 200mm

For instance I have just read the articles on lenses by Rick Denny. Very good they are but I was left wondering how his findings would translate into prints done by an enlarger. I possess no scanner nor have any scanning knowledge

Thanks
Forum: Pentax Medium Format 04-02-2018, 09:57 AM  
Medium Format starter kit under $1k?
Posted By asahijock
Replies: 62
Views: 2,559
The key to whether you need bigger than 645 negs is the question: What is likely to be the biggest print you might want?. Tell us that and we can say if 645 will meet that requirement.

asahijock
Forum: Pentax Medium Format 02-21-2018, 02:21 PM  
Is it worth upgrading from a 200mm f/4 manual lens to a 150mm f/3.5 manual lens
Posted By asahijock
Replies: 12
Views: 937
Thanks for posting, bobbotron. These shots would suit my requirements. On the point of hard to focus which was made, doesn't the green hexagonal light to show focus which you get from the A lenses take away most of not all difficulties in focusing. I only have the 75mm and 45mm lenses but the green light makes it relatively easy to obtain focus, although I can imagine that you might need a more delicate touch to get the light on with a 150/200mm lens - less leeway while moving the focus.

PS the top animal is welcome at my house anytime. The lower one I am less sure of :D

asahijock
Forum: Pentax Medium Format 02-17-2018, 07:42 AM  
Is it worth upgrading from a 200mm f/4 manual lens to a 150mm f/3.5 manual lens
Posted By asahijock
Replies: 12
Views: 937
I thought I had seen somewhere( maybe here?) that the conversion factor from MF(645) lenses to lenses for 35mm cameras was 0.62 which makes the 200 the equivalent of 124 and the 150 equivalent to 93. Have I got the wrong factor?

A comparison would be very useful for those of us such as I who have wondered about the 200 v 150, Thanks

asahijock
Forum: Pentax Medium Format 02-05-2018, 01:39 PM  
Focusing issue with Pentax 645N
Posted By asahijock
Replies: 2
Views: 607
In my experience as long as the lens is an "A" lens designed for the P645 or P645N then the green focusing hexagonal will light up when you have the lens in focus and yes there is an beep as well but it is hardly necessary as the green "dot" shows up well in the viewfinder The correct focus does not rely on you using the correct dioptre in the eyepiece. That for the benefit of your eyesight and not the camera's eyesight

asahijock
Forum: Pentax Medium Format 01-29-2018, 01:30 PM  
Pentax 645N repair
Posted By asahijock
Replies: 22
Views: 1,538
I cannot guarantee that this will work because (A) the repair company is in the U.K. and may not be willing to accept work from beyond the U.K. and (B) may not be prepared to repair medium format Pentax but "Google" Newton and Ellis. They are camera repairers from Liverpool, England.

They are highly regarded in the U.K and if you are willing to ship the camera to them and pay for postage back to Sweden then I do not think that this will be a problem but I have no idea if their expertise extends to the Pentax 645N. Worth contacting them to find out.

asahijock
Forum: Pentax Medium Format 01-10-2018, 01:35 PM  
645 teleconverter
Posted By asahijock
Replies: 18
Views: 1,192
Thanks Alex645. I should have noted that you were not the OP to whom I had addressed my questions and secondly I had inferred wrongly that when you said you'd probably use XP2+ at 1600 this was a suggestion rather than something you had done personally.

asahijock
Forum: Pentax Medium Format 01-08-2018, 02:04 PM  
645 teleconverter
Posted By asahijock
Replies: 18
Views: 1,192
Thanks Alex. Good news that you did it at 800, thus Portra a superb colour film is available even at 2x converter. I had heard( maybe on this site) that the 1.4 was the better of the two converters in terms of resolution etc but your shots with 2x look pretty good to me.

I nearly added in my post that I have the luxury of Ilford D3200 wheregrain is hardly a problem with 645 format unless the enlargement is way beyond what I'd ever need to do. However you are the second person to recommend XP2+ at 1600.

Do you develop the XP2+ yourself and if so or if not what do you or the lab do about development time? I had heard that at a push of two stops such as 1600 the negatives may be a little thin at the standard 3 mins 15 secs. Once upon a time Ilford itself used to give the exposure latitude as up to 1600 but having just looked at the website it seems to suggest up to 800 with no process adjustment. I have done a bit of research but cannot find anything on pushing XP2.

asahijock
Forum: Pentax Medium Format 01-07-2018, 01:43 PM  
645 teleconverter
Posted By asahijock
Replies: 18
Views: 1,192
Nice shots. Can you remember the ISO you used? I have a P645N so a film user. The top ISO in colour is quite limited compared to a digital 645 hence my worry that your ISO might well be higher than I can achieve with film, using even a 1.4 let alone a 2x.

Thanks

asahijock
Forum: Pentax Medium Format 10-10-2017, 02:43 PM  
HELP Pentax 645 winding issue
Posted By asahijock
Replies: 11
Views: 993
I have a P645N but as far as I know the insert and winding mechanism is the same. I, like Alex645, have never experienced a problem. Do you have a second insert you could use to check if the problem re- occurs. It might help rule out if there is anything about the insert that is causing the problem. If it has to be coaxed through it suggests that as the film winds on to the top spool something add a lot of resistance which the batteries cannot overcome. What makes you sure the batteries are fine? I'd try a new set of good quality batteries such as Duracell. Avoid unnamed Chinese cheap batteries. If these do not cure the problem, even initially, then it suggests that something in the insert is not mechanically sound. If it works for the first few films but the problem then manifests itself again then it points to the insert again.

With brand new batteries you can at least eliminate batteries as the problem

asahijock
Forum: Pentax Medium Format 10-09-2017, 09:32 AM  
P645Nii - What is the mechanism determining recognition of the start of the film
Posted By asahijock
Replies: 7
Views: 765
Thanks. Yes it was as demonstrated by other replies


asahijock
Forum: Pentax Medium Format 10-08-2017, 12:56 PM  
K-1 or 645n
Posted By asahijock
Replies: 20
Views: 1,445
Thanks. The MLU of the Nii would seem to be a marginal difference to many but if it makes an observable difference in the 200mm+ range and in slower shutter speeds such as > 1/125th then I understand.

asahijock
Forum: Pentax Medium Format 10-07-2017, 11:21 AM  
P645Nii - What is the mechanism determining recognition of the start of the film
Posted By asahijock
Replies: 7
Views: 765
Thanks. So if the backing paper is damaged and even a small amount has to be cut off this will lose you the corresponding amount of film i.e. the first frame starts later and last frame finishes later. Not necessarily a problem if the start( in terms of frames available) is only a few cms later but if the backing paper had to be cut much further it could lose you a frame or two.

Without wishing to appear to be challenging your conclusion, is this supposition on your part or definite knowledge of how it works in a P645N?

asahijock
Forum: Pentax Medium Format 10-07-2017, 09:59 AM  
P645Nii - What is the mechanism determining recognition of the start of the film
Posted By asahijock
Replies: 7
Views: 765
I possess a P645N not the Nii but I think the above mechanism is the same in both cameras. A thread on another forum involving a P645Nii has prompted me to ask this question. Is it simply a change in thickness where the film starts so if backing paper only were to be rewound onto an empty spool the camera would simply wind the roll on to the end looking for the change in thickness?

I take it for instance that if the start of the paper leader were to be damaged and had to be cut off and a new leader cut to shape the roll would still be perfectly OK? If there were to be damage to the backing paper horizontally along the backing paper such that a section was torn horizontally rather than vertically, this would make no difference other than the obvious one that if it extended a long way the start of the film might be exposed to light but provided the paper was OK to be loaded onto the take-up spool such that it ran through this would not affect the camera recognising where frame 1 was?

Thanks


asahijock
Forum: Pentax Medium Format 10-07-2017, 09:41 AM  
K-1 or 645n
Posted By asahijock
Replies: 20
Views: 1,445
It sounds from what you have said that had it been the 645Nii v the K1 this might have been the "game changer" in terms of which to buy. Can you or anyone else say what the more current 645Nii has compared to the P645N that makes it the "game changer" in terms of choosing analogue over digital.

Thanks

asahijock
Forum: Pentax Medium Format 06-17-2017, 01:11 PM  
Pentax 645nii Data imprint Issues
Posted By asahijock
Replies: 4
Views: 570
I have the P645n not the nii so the instructions as to how you turn on and off the Data imprinting may differ. In my case it says you pull back the Depth of Field preview lever on the camera's side, hold it there while using the up down buttons on the top of the camera which are close to the LCD screen to turn the D on or off. However if the D is showing as you say it is then Data Imprinting is on. With certain lenses you lose some of the data so if it is an A lens and not FA you lose the focal length of the lens and a helicoid extension tub loses you both focal length and aperture.

I am clutching at straws here. It may be possible to have an adaptor on to accommodate a non Pentax lens or maybe even a non 645 lens and you may lose everything but if you have either an A or FA lens on and I appreciate you mention FA lenses and the D is showing then it looks as if you have a fault which will require professional help.

You might want to contact the seller and check with that person.

Best of luck in resolving the issue

asahijock
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